Dangerous Dave platformer · nex-n2-pro

Build a playable tile-based platformer on a canvas in the Dangerous Dave style: navigate a level to grab a trophy and then reach the exit, avoiding hazards like fire and water, with jumping and simple enemies. Procedural graphics only, no external assets.

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We need respond by creating index.html in current dir. Need inspect maybe empty. Need build single-page web app self-contained. Need use tools. Need not external resources. We need implement playable tile-based platformer Dangerous Dave style: navigate level to grab trophy then exit, avoid hazards fire/water, jumping simple enemies. Canvas. Need all in one index.html. Need maybe include controls, responsive, procedural graphics. Need ensure playable. Let's plan.

We need create a complete HTML file. Could include CSS/JS. Need maybe no external assets. Need game loop, tilemap, physics, level data, procedural drawing. Features:
- Canvas 960x540 maybe scale to fit.
- Tile size 32.
- Level 30x17 maybe.
- Tiles: solid, trophy, exit, fire, water, enemy, coins maybe.
- Player starts left, objective trophy first, then exit opens? Dangerous Dave style: trophy must be collected before exit. We can implement exit locked until trophy.
- Platformer controls arrow/A-D, space/W jump, R reset.
- Tile-based collision. Player has AABB, velocity, gravity, friction, jump.
- Enemies simple patrol, collide with tiles, turn.
- Hazards: fire/water kill or respawn. Fire maybe animated. Water is hazard tiles.
- Procedural graphics: pixel art style using canvas shapes, gradients, tile patterns.
- Side-view camera.
- Maybe multiple levels? User asked a level, so single. Could include generated map. But "tile-based platformer" maybe level array.

Need create file. Need maybe include "Dangerous Dave style" but not actual copyrighted assets. Use retro platformer aesthetic.

Need maybe implement robust. Let's design.

HTML structure:
<!doctype html>
<html lang="en">
<head><meta charset...><title>Trophy Dash...</title><style> ... body, game shell, canvas, overlay UI. </style></head>
<body>
<div id=wrap>
<h1>Dangerous Dave-style Trophy Dash</h1>
<div id=canvasWrap><canvas id=game width=960 height=540></canvas><div id=message>...</div></div>
<div id=controls>...
</div>
<script>
(() => {
const canvas=... ctx...
const TILE=32;
const level = [
"...........................",
...
];
Need map dimensions. Let's create 36 cols x 17 rows maybe width 1152 height 544. Canvas 960x540, camera scroll. Level height 17 rows. We'll include solids '#' and 'b' brick, 'p' platform? For tile-based platform, all solid. Could include ladder? not necessary.
Need hazards: 'f' fire, 'w' water. Trophy 't', exit 'e', enemies 's'.
Need draw tiles.

Let's create level string 35 columns maybe 36. Need camera bounds. Canvas 960x540, tile 32, rows 17 => 544. Canvas height 540, slight. Let's use 960x544. CSS fit. Level width maybe 42 cols = 1344. Good.

Need ensure player can navigate. Need platform gaps, hazards. Need design level.

Coordinate: tile x,y. Solid tiles block. Use '#' for dirt/stone, 'b' brick, maybe 'v' vines? We can make solid.
Map row 0 to 16. Player at tile (2,14). Need ground row 15 maybe, row 16 maybe. Let's create:
cols 42, rows 17.
Rows:
0: "..........................................";
1: "..........................................";
2: "...................tt? no trophy on platform?";
Need trophy on high platform at x28 y10 maybe.
Exit at x39 y13 maybe on ground.
Ground: row15 solids across, row16 maybe solids. But water/fire on row15? Hazards occupy tile replacing ground? Need water hazards as pits maybe row15/16 empty and water at row16? But collision with water should kill. For tile map, if water tile at row15, player can stand on it? Need hazard collision if AABB overlaps water, not solid. So water can be placed in empty pit row15? We need ground around.
Let's design:
row15: "#####################################???##" with pits. But exit maybe on floor at row14? If row15 solid, exit tile should be above? Exit at row14, player stands on row15, exit tile maybe x39 y13? Hmm exit drawn as door tile on row13-14, entrance at tile (39,13). If player collides with exit tile when trophy collected, win. Exit not solid? Could be non-solid.
Hazards on row15 with pits maybe water/fire. Fire hazard can sit on ground at row14? If fire tile at row15 replacing ground, player overlaps hazard while standing. Fine. Water in pit at row15 with ground row16? But if row16 solid and water at row15, player falls into water and overlaps. Need map row15 water, row16 solid? It would look water pool. But if water is not solid, player falls through to row16? They overlap water, die. Good.

Maybe easier: rows 0-16. Ground row15 solid, row16 solid decorative. Pits at x10-12 row15/16 empty? But canvas bottom at 544, falling below kills. Water tiles at row15 in pit, row16 solid? But row16 solid below water maybe not visible. If player falls into water, overlap water before row16. Good. But if row16 solid under water, player may hit ground, but hazard kills.

Need platforms. Let's use tilemap string.
Rows:
0 "..........................................";
1 "..........................................";
2 "...................###....................";
3 "...................#t#....................";
4 "...................####...................";
5 "..........###...............###...........";
6 "..........................................";
7 "....................###...................";
8 "......###.................................";
9 ".........................###..............";
10 "..........................................";
11 ".....................###...........###....";
12 ".......###..........................#e#...";
13 ".................................###..###...";
14 "....................ww............f....#....";
15 "###############.....####....#########..#....";
16 "###############.....####....#########..#....";
Need exact 42 length. Let's count. Better generate level programmatically with arrays? Could use helper to create map of empty and add solids? But final code can include map as array of strings. Need ensure all same length. Let's carefully create 42 columns.

Let's set COLS=42, ROWS=17. Need strings length 42.

Maybe use an editor? We can write file then test maybe no test. Need ensure strings length. Could use JS to pad? Better build level procedurally from data? But tile map easier if code pads rows to COLS. We can define shorter strings and pad to COLS in JS. That avoids exact length. But map visually still okay. Could use strings with spaces? Use ".". We'll pad.

Let's create rows with varied lengths <=42 and JS padEnd(COLS,'.'). But if shorter, positions relative. Need map width 42. Good.

Rows:
0 ".........................................." length 42 maybe.
Let's define all with 42 manually or pad. Use padEnd in code.

Rows:
0 ".........................................."
1 ".........................................."
2 "...................###..................."
3 "...................#T#..................."
4 "...................####.................."
5 "..........###...............###.........."
6 ".........................................."
7 "....................###.................."
8 "......###..............................."
9 ".........................###............"
10 "........................................"
11 ".....................###...........###.."
12 ".......###..........................E..."
13 ".................................###..D."
14 "....................WW............F......."
15 "###############.....####....#########..D."
16 "###############.....####....#########..D."
Need pad.

Need check positions. Trophy tile T at row3 col20 maybe. Exit D at rows12-16? Actually if exit is tile 'D' in rows13-16 at col38? Need exit as 2x3 door. We can use 'D' solid? Hmm exit should be non-solid? If we use D in map, draw door; collision with exit tile. If D is non-solid, player can pass through. But D at rows13-16 maybe occupies vertical door. Need player collides if overlap. It can be non-solid but still exit. Good. But if row15 ground has D instead of solid, player can stand? Door at row13-15, floor row16 maybe D? If D row16, player overlaps lower door? Maybe better place exit at x39 y13, door 2x3, no collision except exit. Ground row15 at x39? If D at row15, no floor. Player can stand maybe on row16 D? But D non-solid, so falls. Hmm.
Let's separate exit door at row13-14, ground row15 solid. Player stands on row15 and overlaps exit door at row14. Good. Put 'E' at row13/14 maybe. Map:
row12 ".................................###..E..."
row13 ".................................###..E..."
row14 "....................WW............F......."
row15 "###############.....####....#########..#.."
row16 "###############.....####....#########..#.."
But exit at col38, row12/13, player on row15 (y=15), height maybe 26, top at y=15*32-26=454, exit tile y=13*32=416, height 64 extends to 480. Player AABB overlaps y454-480, x around 1216, exit x 1216. Good. So collect when trophy.

Trophy at row3 col20, platform row2/4? Need can reach. Ground row15. Platforms at row8 col6, row5 col10, row11 col20, row5 col30, trophy on row3 col20 with platform row4? Actually trophy tile should be on top of platform. If T at row3, platform row4 below, player stands on row4. Good. But row3 T non-solid, draw trophy. Need row2 maybe decorative? T at row3. Need platform row4 below. row5 maybe maybe. Good.

Need player jump height. Tile 32, player height 26. Gravity maybe 0.55, jump -11.5, max jump ~120 px (3.75 tiles), horizontal speed 3.3. Enough.

Need map:
Rows:
0 ".........................................."
1 ".........................................."
2 "...................###..................."
3 "...................#T#..................."
4 "...................####.................."
5 "..........###...............###.........."
6 ".........................................."
7 "....................###.................."
8 "......###..............................."
9 ".........................###............"
10 "........................................"
11 ".....................###...........###.."
12 ".......###..........................E..."
13 ".................................###.E.."
14 "....................WW............F....."
15 "###############.....####....#########..#.."
16 "###############.....####....#########..#.."
Need all pad.

Need maybe enemy at row14 col26? Use 'S'. Place at row14 on ground? But if 'S' replaces solid at row15? We can place enemy entity separately? In map, 'S' non-solid, at row14, ground row15. Enemy y=14*32. Good. Need another enemy at row11 platform? If S at row10 on platform row11. Add maybe 'S' in row10 col31. But map row10 currently dots. Use S at col31: ".........................###..S......."? We'll adjust. Enemies spawn from S. Need not solid.

Need hazards: W at row14 col20-21? But if W replaces ground? Row15 at col20-21 is ####? Actually row15 "###############.....####....#########..#.." positions 0-14 solid, 15-18 dots, 19-22 ####, 23-26 dots, 27-35 #########, 36-37 dots, 38 #. W at row14 col20-21, ground below, fire F at row14 col31, ground below. Player overlaps hazard while walking on ground. Good.
Water pit at col15-18 row15 dots? row14 dots, row15 dots, row16 dots? We have row15 dots col15-18, row16 dots. Falling kills bottom maybe no water. Could place W row16? But row16 dots. Hmm. We need water hazard visible in pit. Put W at row15 col15-18, row16 W? But row15/16 W non-solid. It will be bottom water. Player falls into and overlaps. Good. But if row16 W, falling below also. Let's set row15 "###############....WWWW####....#########..#.."? Need positions.
Let's index carefully.

Maybe use code to generate map from list and pad. We can include W row14? Let's create with a helper:
const rawMap = [
"..........................................",
...
];
const level = rawMap.map(row => row.padEnd(COLS, ".").slice(0, COLS));
So lengths not issue.

Need ensure positions. Let's create rows with spaces? no.

Let's count with Python? Could write. But final code doesn't need exact? Need playable. Let's use bash maybe to count and maybe simulate? We can create temp script? We'll craft.

Alternative: define map as array of arrays in JS via helper functions: start all empty, add rectangle solids, add platforms, hazards, trophy, exit, enemies. This avoids string length and easier. But tilemap visual maybe less direct. Could use functions:
const tiles = Array.from({length: ROWS}, () => Array(COLS).fill('.'));
function rect(x,y,w,h,ch) { ... }
function line? Add ground: rect(0,15,15,2,'#'), rect(19,15,4,2,'#'), rect(27,15,9,2,'#'), rect(38,15,1,2,'#')
Platforms: rect(6,8,3,1,'#'), rect(10,5,3,1,'#'), rect(19,2,3,1,'#'), rect(19,4,4,1,'#') etc.
Trophy tile at (20,3), exit door at (38,12),(38,13), maybe.
Hazards: water rect(15,16,4,1,'W'), fire at (31,14).
Enemies: spawn at (25,14), (31,10).
This is better. Use procedural map. Need draw all.

But user asked tile-based; tile array is okay. Need include map editor maybe.

Let's design level with helper. We can include "Dangerous Dave style" maybe "Trophy Dash" in title.

Physics:
const keys = {};
window.addEventListener('keydown', e => { keys[e.code]=true; if([...].includes) e.preventDefault(); if(e.code==='KeyR') reset();});
keyup.

Entities:
const player = {
x: 64, y: 15*TILE-28, w: 18, h: 26, vx:0, vy:0, facing:1, onGround:false, dead:false, hasTrophy:false, invuln:0, spawnX...
};
Gravity 0.65, maxFall 14, moveAccel maybe 0.55, maxSpeed 3.3, friction 0.82.
Jump if pressed and onGround: vy = -11.2, onGround=false, coyote? simple.
Need maybe jump cut on keyup: if vy < -4 then vy += 0.35.

Collision:
tileAt(tx,ty) returns tile char or '.'
isSolid(tile): ['#','b','P'] maybe.
getSolidTilesForAABB(x,y,w,h): iterate floor x/TILE to floor((x+w-1)/TILE), y...
Move axis separately:
function moveAndCollide(ent, dx, dy, isPlayer=false) {
ent.x += dx; resolveX; ent.y += dy; resolveY.
}
For player:
vx from keys. if no input, vx *= friction.
vy += gravity; clamp.
moveX(vx), moveY(vy).
resolveX: if vx>0, right tile, ent.x = tx*TILE - ent.w; vx=0. if vx<0 left.
resolveY: if vy>0, bottom tile, y=ty*TILE-h, vy=0, onGround=true; if vy<0 top.
Need if exit/trophy non-solid. Hazard tile detection after movement.

Enemies:
class? array objects {x,y,w,h,vx,vy,onGround,type}. Spawn from map S.
Enemies move with simple AI: vx = dir*1.1, gravity, collision. Turn if wall or edge. Need detect edge: sample tile below ahead: tileAt(floor((x + (dir>0 ? w+2 : -2))/TILE), floor((y+h+3)/TILE)) solid. If not solid or solid ahead, dir*=-1.
Need collision with player: if overlap and player invuln<=0 maybe kill/respawn. Dangerous Dave style maybe enemies kill. We can reset. Maybe simple.

Hazards:
Check if player AABB overlaps tile f or W. Fire can be tile at row14 col31. Water row16 col15-18. If overlap kill.
Need maybe fire animated by drawing flicker, water waves.

Trophy:
tile 'T' at (20,3). Check overlap with player; set hasTrophy true; tile='.'; message "Trophy! Get to the exit!".
Exit:
tile 'E' at (38,12),(38,13). If player overlaps and hasTrophy, win. If not, message "Grab trophy before exit!".
Need maybe exit glows after trophy.
Camera:
cameraX = clamp(player.x + player.w/2 - canvas.width*0.42, 0, COLS*TILE - canvas.width); cameraY=0.
Draw:
ctx.clearRect.
Background: sky gradient, distant mountains/parallax, clouds, maybe sun.
Tiles: for visible tile range. drawTile(tile, x,y,t). Use procedural:
- '#': ground: fill brown/dark, top grass? Since tile char maybe earth. Draw rect with shadow, top darker line, small speckles.
- 'T' trophy: draw trophy on platform? Since T non-solid, draw golden cup with shine.
- 'E': draw exit door: if hasTrophy open green/yellow glow, else locked red.
- 'W': water: draw blue tile with waves, animation.
- 'F': fire: draw flames.
- Maybe 'b' bricks for platforms. We can use '#', maybe add 'B' for bricks.
Need draw map with tile variants. If all '#', okay. Could draw platform with top highlights.
Need maybe draw decorative vines? Not necessary.
Need draw enemies: simple red/orange robots/guards with eye, legs.
Need draw player: pixel-art style Dave-like? Avoid exact copyrighted character? We can draw retro explorer: tan face, red cap, blue shirt, brown boots, simple.
Need draw trophy after collected? Maybe player carries trophy icon above/behind.
Need UI overlay:
Draw in canvas: top HUD: "Trophy: Taken/Missing", "Exit: Locked/Open", "Lives?"; maybe message.
Also HTML overlay maybe for controls and message. But simpler draw.
Need maybe start screen? Could include overlay message. Need playable immediately.
Need canvas focus? Key events on window.
Need touch controls? Could include on-screen buttons for mobile? Not required but nice. Single page. Need no network. Could add touch controls with buttons. But maybe too much. User asked playable. We can include keyboard controls. Need maybe "click canvas to focus"? Key events window no.

Need maybe "Dangerous Dave style" means old DOS, tile map, trophy and exit. We can say title "Trophy Dash". Need no external assets.

Need maybe implement death/respawn:
function killPlayer(reason) { deaths++; resetPlayer(); flash; message = reason; }
If falls below ROWS*TILE+100 kill.
If enemy/hazard kill.
Need maybe player invuln after respawn 1.2 sec.
Need maybe win: state='won', message "You got the trophy and escaped! Press R to play again." Maybe after win, exit animation, no physics.

Need maybe reset function:
player.x=2*TILE+8; y=14*TILE? Wait ground row15, player stands at y=15*TILE - h = 454? row14 y=448, height 26. Spawn at x=2*TILE+7=71, y=15*TILE - 26=454. But row15 ground starts y=480. Good.
Map reset: recreate map, trophy tile, exit tiles, enemies.
Need not reset deaths? maybe.

Need maybe level helper:
function buildLevel() {
map = Array.from({length: ROWS}, () => Array(COLS).fill('.'));
rect(0,15,15,2,'#');
rect(19,15,4,2,'#'); // after pit?
rect(27,15,9,2,'#');
rect(38,15,1,2,'#');
rect(6,8,3,1,'#'); // platform
rect(10,5,3,1,'#');
rect(19,2,3,1,'#');
rect(19,4,4,1,'#');
rect(20,7,3,1,'#');
rect(30,5,3,1,'#');
rect(21,11,3,1,'#');
rect(33,11,3,1,'#');
rect(7,12,3,1,'#');
rect(31,13,3,1,'#'); // platform before exit?
rect(38,12,1,2,'E'); // exit non-solid
map[3][20]='T';
rect(15,16,4,1,'W'); // water pit
map[14][31]='F'; // fire on ground col31
enemies = [{x:25*TILE, y:14*TILE, w:22,h:22, dir:-1}, {x:31*TILE, y:10*TILE, w:22,h:22, dir:1}];
}
Need check platforms reachable:
Spawn at x 2, ground col0-14. Platform at x6,y8, can jump from ground to platform? Need jump height 120px (3.75 tiles), platform y8 top =256, ground top=480, difference 224 (7 tiles) too high. Need intermediate platform. Platform at x7,y12 maybe reachable? Ground top 480, platform y12 top 384, diff 96 (3 tiles), reachable. Add rect(7,12,3,1,'#') maybe. Then from y12 to y8 diff128 (4 tiles), maybe reachable with max jump ~120, close. Could add rect(7,10,2,1) or x10,y5. Let's design better:
Ground to platform at y12 (3 tiles), then to y9 (3 tiles), then y6 (3), then y3? Trophy platform at y4? Need.
Let's set:
rect(7,12,3,1,'#');
rect(10,9,3,1,'#');
rect(13,6,3,1,'#');
rect(19,4,4,1,'#'); trophy at (20,3)
But horizontal distances. Need player can jump across.
Maybe use platforms:
- x7 y12 width3, from ground x2-14 reachable.
- x11 y9 width3, distance 4 tiles, height 3, reachable.
- x15 y6 width3, distance 4, height3, reachable.
- x19 y4 width4, distance4, height2, reachable. Trophy at x20,y3.
Good.
Then descent to right:
- x24 y8 width3 maybe from trophy platform x19 y4 to x24 y8 diff4 tiles down, horizontal 5, reachable.
- x29 y11 width3, diff3, horizontal5, reachable.
- x33 y13 width3, diff2, horizontal4, reachable.
- ground x27 y15 maybe. Need from platform x33 y13 to ground x27? Hmm.
Maybe simpler after trophy, jump down to ground section at x27-35. Platform at x31 y13, ground top 480, platform top 416, diff 64, easy. Ground starts x27. Good.
Need hazards on ground: fire at col31, water pit at col15-18. Ground segments:
- left ground x0-14.
- water pit x15-18, then ground x19-22.
- gap x23-26, ground x27-35, gap x36-37, exit column x38? Need player reach exit at x38.
Need maybe platform over water/gap? Add rect(21,11,3,1) above gap? But not necessary.
Potential path:
Start left, jump to platform chain to trophy, drop down to ground x19-22, cross to x27 ground by jumping over gap x23-26 (4 tiles) maybe possible with speed 3.3. Gap width 4 tiles=128px. Player speed 3.3, jump duration maybe ~1.5s, distance 150, okay. Then avoid fire at x31, avoid enemy, reach exit at x38.
Water pit x15-18 between left ground and middle ground. Need jump 4 tiles (128px) with maybe platform at x17 y11? Add platform x17 y11 width3 to cross? But path to trophy maybe.
Maybe add a bridge platform over water: rect(16,11,3,1,'#'), but water pit x15-18. From left ground to x16 y11 diff 4 tiles (128px), horizontal 14 tiles? too far. Better water pit width 2 tiles not 4. Let's set water pit x15-16. Ground segments x0-14, x17-22. Gap 2 tiles easy. Add W at x15-16 row16. Then middle ground. Good.
Fire at x31, enemy around x29. Need avoid.
Ground:
rect(0,15,15,2,'#'); // x0-14
rect(17,15,6,2,'#'); // x17-22
rect(27,15,9,2,'#'); // x27-35
rect(38,15,1,2,'#'); // exit floor
Water x15-16 row16. Gap x23-26 (4 tiles) between middle and right ground.
Need maybe from middle ground to right ground jump 4 tiles, okay.
Need maybe fire at x31 on right ground, can jump over.
Exit at x38 with floor x38; gap x36-37, need jump 2 tiles from right ground to exit floor. Exit door at x38 y12-13, floor x38. Good.
Need maybe enemy on right ground at x29-35. Enemy at x29, y14, ground row15. It may patrol x27-35. Avoid.
Need maybe enemy on platform x11? Could spawn at x11 y8? But not necessary. Simple enemies.

Let's implement map:
function buildLevel() {
map fill '.';
rect(0,15,15,2,'#');
rect(17,15,6,2,'#');
rect(27,15,9,2,'#');
rect(38,15,1,2,'#');
rect(7,12,3,1,'#');
rect(11,9,3,1,'#');
rect(15,6,3,1,'#');
rect(19,4,4,1,'#');
rect(24,8,3,1,'#');
rect(29,11,3,1,'#');
rect(33,13,3,1,'#');
map[3][20]='T';
rect(15,16,2,1,'W'); // water pit
map[14][31]='F';
rect(38,12,1,2,'E');
enemies = [
{x: 29*TILE+5, y:14*TILE+10, w:22,h:22, vx:-1, dir:-1, onGround:false, t:Math.random()*10},
{x: 11*TILE+5, y:8*TILE+10, w:22,h:22, vx:1, dir:1, onGround:false, t:...}
];
}
Need ensure platform at x15 y6: water pit at x15 row16 no conflict. Good.
Need maybe rect(19,4,4,1) and trophy at row3 col20. Player stands on row4 platform, trophy tile at row3. Good.

Need check jump from ground x0-14 to platform x7 y12. Platform top y=384, ground top y=480, diff 96. Horizontal from spawn x=2.5 to platform x7, distance maybe 144 px, okay.
From platform x7 y12 to x11 y9: diff 96, horizontal 128, okay.
From x11 y9 to x15 y6: diff96, horizontal128.
From x15 y6 to x19 y4: diff64, horizontal128.
Trophy x20 y3.
From trophy platform x19-22 y4 to x24 y8: diff128 downward, horizontal64, okay.
From x24 y8 to x29 y11: diff96 downward, horizontal160, maybe okay. From platform width 96, speed 3.3, jump duration maybe 1.1s, distance 110, maybe tight. Could add x27 y10? Or make x24 width4. rect(24,8,4,1). Good.
From x29 y11 to x33 y13: diff64, horizontal128, okay.
From x33 y13 to ground x27-35: platform y13 top416, ground top480 diff64, easy. It overlaps x33-35 above ground x27-35, can drop.
Need maybe platform at x33 y13 over ground x33-35, okay.
Need exit x38, floor x38, gap x36-37. From ground x27-35 to x38 floor: gap 2 tiles + exit floor. Need jump from x35 to x38, horizontal maybe 96. Easy.
Need fire at x31 on ground. Player can jump over or avoid.
Need water pit x15-16. Since water at row16, ground row15 absent. Player falls into water. Need map row16 W, not solid. If falls below row16, kill. Good.
Need draw water at y=16*32=512, canvas height 544, water 32 high. Good.

Need maybe fire at row14 col31, ground row15. Fire tile y=448, player stands on ground y=480, height26, AABB y454-480, overlaps fire y448-480. Good.

Need maybe exit door at x38 y12-13. Door x=1216, y=384-448. Player at floor x38 y=454-480, overlaps lower door y416-448? AABB y454-480, no overlap with door if door ends at 448. Need extend exit to y14 maybe. Put rect(38,12,1,3,'E') rows12-14. Then door y384-480, player y454-480 overlaps. Good. Floor x38 row15. Need not solid. So rect(38,12,1,3,'E').
Need maybe exit width 1 tile, player width18, x38*32=1216, player x around 1216, overlaps.
Need maybe locked exit message if touch without trophy. Good.

Need maybe camera width. Level width 42*32=1344. Canvas 960. Camera max 384. Exit at x1216, camera near 832? Actually camera clamps to 384, so exit x1216 appears at 832, visible. Good.
Need maybe player can fall below: if y > ROWS*TILE+80 kill.

Need maybe draw HUD:
function drawHUD() {
ctx.save();
ctx.fillStyle = 'rgba(0,0,0,.45)'; roundRect...
ctx.fillText(`Trophy: ${hasTrophy?'SECURED':'SEEK'}`);
ctx.fillText(`Exit: ${hasTrophy?'OPEN':'LOCKED'}`);
ctx.fillText(`Deaths: ${deaths}`);
ctx.fillText(`Controls: A/D or ←/→, W/↑/Space jump, R reset`);
if messageTimer >0 draw message.
}
Need maybe HTML controls outside? Could include in page.
CSS:
body background #111; color #f5e6a0; font-family monospace; display flex; align-items center; justify-content center; min-height 100vh; margin 0.
#app max-width 1000; text-align center.
canvas image-rendering: pixelated; background; border; box-shadow.
#help maybe.
Need maybe no external resources. Fonts system.

Need maybe use CSS "image-rendering: pixelated".
Need maybe include touch buttons? Could add div touch controls with buttons? But all in one file. Could be useful. But if using keyboard, okay. Maybe implement pointer controls? Not necessary.
But user might expect playable on mobile? We can include on-screen D-pad and jump. However touch controls may complicate but nice. Need no external. We can add buttons in HTML and JS pointer events. But if we use key events, enough. Could add "Tap canvas on touch". But maybe not.

Need maybe handle high-DPI scaling. Canvas internal 960x544, CSS width min(96vw,960). It will scale. Use ctx no devicePixelRatio? If CSS scales, okay. Could set canvas width/height. Need maybe crisp.
Need maybe if user resizes, CSS. No need.

Need maybe "Dangerous Dave style" maybe title "Trophy Dash" and subtitle.

Need maybe use procedural graphics only. We must not use images/fonts. Good.
Need maybe use localStorage? no.

Need maybe implement collision with enemies:
function rectsOverlap(a,b). If player invuln <=0 and overlap enemy -> kill. Maybe after respawn, enemies reset? buildLevel resets.
Need maybe enemies killed? Not required. Could allow player to stomp enemy? Dangerous Dave has no stomp? Simple enemies. Maybe if player lands on enemy from above, enemy dies? Could add simple. But user said simple enemies. Let's implement stomp? Could be fun. If player.vy > 1 && player.y+player.h - enemy.y < 12, enemy.dead=true, player.vy=-7, score++? But not necessary. Maybe no kill. Simpler: enemies kill player. But "simple enemies" maybe patrol. Fine.
Need maybe "fire and water" hazards. Yes.
Need maybe "grab trophy and then reach exit" yes.

Need maybe procedural map generation? User didn't ask procedural level, only procedural graphics. Could use fixed level. Maybe "tile-based" enough.
Need maybe "Dangerous Dave style" maybe trophy tile and exit. Good.

Need maybe file creation. We can write index.html. Need ensure no syntax errors. Let's craft carefully.

Need maybe use read? Could inspect current directory. Use bash ls.

→ bash {"command":"ls -la /tmp/ws"}

toolResult

total 0 drwxr-sr-x. 2 node node 6 Aug 1 20:32 . drwxrwsrwx. 3 root node 16 Aug 1 20:32 ..

assistant

thinking

Need write index.html. Need craft code. Let's plan code fully.

HTML:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Trophy Dash - Canvas Platformer</title>
<style>
:root { ... }
* { box-sizing:border-box; }
html,body { margin:0; min-height:100%; background: radial-gradient...; color; font-family: "Courier New", monospace; }
body { display:flex; align-items:center; justify-content:center; padding:18px; overflow-x:hidden; }
.app { width:min(100%, 1020px); }
h1 ...
.canvas-card { position:relative; padding:10px; border; background; box-shadow; }
canvas { display:block; width:100%; max-width:960px; height:auto; margin:auto; image-rendering: pixelated; border-radius:8px; background:#000; touch-action:none; }
.status { margin-top:10px; display:flex; flex-wrap:wrap; justify-content:center; gap:8px; font-size:14px; }
.badge { ... }
kbd { ... }
#toast maybe? But draw HUD in canvas. Maybe help text.
</style>
</head>
<body>
<main class="app">
<h1>Trophy Dash</h1>
<div class="canvas-card"><canvas id="game" width="960" height="544" aria-label=...></canvas></div>
<div class="status">
<span class=badge><b>Move</b> <kbd>A</kbd>/<kbd>D</kbd> or <kbd>←</kbd>/<kbd>→</kbd></span>...
</div>
</main>
<script>
(() => {
'use strict';
const canvas = document.getElementById('game');
const ctx = canvas.getContext('2d');
ctx.imageSmoothingEnabled = false;
const TILE = 32;
const COLS = 42;
const ROWS = 17;
const WIDTH = COLS*TILE;
const HEIGHT = ROWS*TILE;
const GRAVITY = 0.62;
const MAX_FALL = 15;
const MOVE_SPEED = 3.35;
const ACCEL = 0.42;
const FRICTION = 0.82;
const JUMP = -11.4;
const keys = Object.create(null);
let map, enemies, particles, trophyTaken, deaths, state, message, messageTimer, cameraX, player, time=0;
const solidChars = new Set(['#']);
function makeMap() { return Array.from({length: ROWS}, () => Array(COLS).fill('.'));}
function rect(x,y,w,h,ch) { for(let yy=y; yy<y+h; yy++) for(let xx=x; xx<x+w; xx++) if (xx>=0&&xx<COLS&&yy>=0&&yy<ROWS) map[yy][xx]=ch; }
function buildLevel() { map=makeMap(); rect(0,15,15,2,'#'); rect(17,15,6,2,'#'); rect(27,15,9,2,'#'); rect(38,15,1,2,'#'); rect(7,12,3,1,'#'); rect(11,9,3,1,'#'); rect(15,6,3,1,'#'); rect(19,4,4,1,'#'); rect(24,8,4,1,'#'); rect(29,11,3,1,'#'); rect(33,13,3,1,'#'); map[3][20]='T'; rect(38,12,1,3,'E'); rect(15,16,2,1,'W'); map[14][31]='F'; enemies = [ createEnemy(29,14,-1), createEnemy(11,8,1), createEnemy(34,14,1)]; particles=[]; trophyTaken=false; deaths=0; state='playing'; message='Grab the trophy, then reach the green exit.'; messageTimer=4; }
Need maybe createEnemy after function? Function declaration hoisted.
function createEnemy(tx,ty,dir) { return {x:tx*TILE+5,y:ty*TILE+10,w:22,h:22,vx:dir*1.1,dir,onGround:false,t:Math.random()*10};}
function resetPlayer() { player = {x:2*TILE+7,y:15*TILE-26,w:18,h:26,vx:0,vy:0,onGround:false,facing:1,invuln:1.2,spawnX:2*TILE+7,spawnY:15*TILE-26}; }
But buildLevel resets deaths and state; if called after win, resets. Need reset function maybe.
function resetGame(full=true) { buildLevel(); resetPlayer();}
But buildLevel sets player? Let's do:
function resetGame() { buildLevel(); resetPlayer(); }
window.addEventListener('load', resetGame); But script at end, can call.
Need if buildLevel resets deaths, but resetPlayer after. Good.
Need maybe messageTimer in seconds.

Input:
window.addEventListener('keydown', e => { const block = ['ArrowLeft','ArrowRight','ArrowUp','ArrowUp','Space','KeyA','KeyD','KeyW','KeyR']; if(block.includes(e.code)) e.preventDefault(); if(e.code==='KeyR') resetGame(); keys[e.code]=true; });
keyup keys[e.code]=false.
Need maybe if keyup R? no.
Need maybe blur clear keys.

Physics:
function tileAt(x,y) { if(x<0||x>=COLS||y<0||y>=ROWS) return '#'; return map[y][x]; }
function isSolid(ch) { return ch === '#'; }
function tileRectOverlap(rx,ry,rw,rh,ch) { iterate floor(rx/TILE) ... return true if tileAt(tx,ty)===ch; }
function anyHazardOverlap() { for y tiles ... if tileAt(tx,ty)==='F'||'W' return true; }
function exitOverlap() { ... 'E' }
function trophyOverlap() { ... 'T' }
function moveEntity(ent, dx, dy, solid=true) { ent.x += dx; resolveAxis(ent,'x'); ent.y += dy; ent.onGround=false; resolveAxis(ent,'y'); }
For enemies and player. Need resolveAxis uses isSolid. For exit/trophy non-solid, no collision.
function resolveAxis(ent, axis) {
const x0=Math.floor(ent.x/TILE), x1=Math.floor((ent.x+ent.w-0.01)/TILE); etc.
if axis x: if ent.vx>0, for each tile y, if isSolid(tileAt(x1,ty)) { ent.x = x1*TILE - ent.w; ent.vx=0; } else if vx<0 ...
if axis y: if ent.vy>0, for each tile x, if isSolid(tileAt(tx,y1)) { ent.y = y1*TILE - ent.h; ent.vy=0; ent.onGround=true; } else if vy<0 top.
}
Need tileAt out of bounds solid, so if y>=ROWS returns '#'. For player falling below, tileAt returns #? But if y>ROWS, x1 maybe, y1>=ROWS, tileAt returns '#'; resolve will set y=ROWS*TILE - h, so player lands at bottom not fall. But we want falling below kills if in pit. Since tileAt returns # for y>=ROWS, it will prevent falling below. But if in pit, y1 maybe 17, tileAt returns #, so player lands at bottom (y=518), not kill. That's okay? But water pit row16 W, if no water? It would land on invisible floor. Better tileAt y>=ROWS return '.'? But for out-of-bounds x maybe solid to keep side. For y>=ROWS return '.' so falling kills. For x<0 or x>=COLS return '#'. For y<0 return '#'. For y>=ROWS return '.'.
function tileAt(tx,ty) { if(tx<0||tx>=COLS||ty<0) return '#'; if(ty>=ROWS) return '.'; return map[ty][tx];}
Then if player falls below kill.

Need collision with exit/hazard after move.
function updatePlayer(dt) {
if(state !== 'playing') return;
const left = keys.ArrowLeft||keys.KeyA; right...
if(left&&!right){ player.vx -= ACCEL; facing=-1; } else if ...
if(!left&&!right) player.vx *= FRICTION; if Math.abs<0.05 ->0; clamp.
const jumpPressed = keys.Space||keys.ArrowUp||keys.KeyW;
if(jumpPressed && player.onGround) { player.vy=JUMP; player.onGround=false; spawnParticles(player.x+...); }
if(!jumpPressed && player.vy < -3) player.vy += 0.28; // variable jump
player.vy = Math.min(MAX_FALL, player.vy + GRAVITY);
moveEntity(player, player.vx, player.vy);
if(player.invuln >0) player.invuln -= dt;
// trophy
if(tileRectOverlap(player,'T')) { trophyTaken=true; set map tiles; message; }
// hazards
if(tileRectOverlap(player,'F')||tileRectOverlap(player,'W')) killPlayer('The hazards got you. Press R or wait for respawn.');
// enemies
for enemies if alive && overlap -> killPlayer
// exit
if(tileRectOverlap(player,'E')) { if(trophyTaken) win(); else { message='Exit is locked until you grab the trophy!'; messageTimer=2; maybe nudge? } }
if(player.y > HEIGHT+80) killPlayer('You fell into the pit.');
}
Need note tileRectOverlap uses current map. If trophyTaken set map[3][20]='.'; good.
Need maybe if killPlayer sets state? We want respawn automatically? Maybe "Press R or wait" but if state playing, reset after delay. Simpler: killPlayer(reason) { deaths++; message=reason; messageTimer=2.2; spawnParticles; resetPlayer(); } It respawns immediately. But message visible. That is okay. Maybe add invuln.
function killPlayer(reason) { deaths++; message=reason; messageTimer=2.4; spawnDeathParticles(player.x+...); resetPlayer(); }
Need not reset map? No. If death by enemy, enemy remains. Good.
Need if resetPlayer after kill, messageTimer persists? resetPlayer doesn't reset message. Good.
Need if state won, no update.
Win:
function win() { state='won'; message='You escaped with the trophy! Press R to run it again.'; messageTimer=Infinity; }
Need maybe draw victory overlay.

Update enemies:
function updateEnemies(dt) {
for (const e of enemies) {
e.t += dt;
e.vy = Math.min(MAX_FALL, e.vy + GRAVITY);
moveEntity(e, e.vx, e.vy);
// turn on wall handled by moveEntity setting vx=0. If e.vx==0 due wall, turn.
const aheadX = e.x + (e.dir > 0 ? e.w + 3 : -3);
const footY = e.y + e.h + 4;
const tileAhead = tileAt(Math.floor(aheadX/TILE), Math.floor((e.y + e.h/2)/TILE));
const tileBelowAhead = tileAt(Math.floor(aheadX/TILE), Math.floor(footY/TILE));
if(e.vx === 0 || !isSolid(tileBelowAhead) || isSolid(tileAhead)) { e.dir *= -1; e.vx = e.dir * 1.1; }
}
}
Need if enemy on platform x11 y8, tileBelowAhead solid at row9? platform y8, enemy y=8*32+10=266, h22 bottom288, footY292, tile row9 (288) solid. Good.
Need enemy at x29 y14, footY=480? row15 solid. Good.
Need enemy at x34 y14.

Need particles:
function spawnParticles(x,y,color,count=12) { for i push {x,y,vx,vy,life,max,size,color};}
updateParticles(dt): life-=dt; x+=vx*dt*60? Use dt seconds. vx in px/sec.
In kill, spawnParticles(player.x+player.w/2, player.y+player.h/2, '#ff5b5b', 24); resetPlayer; maybe no death animation because reset immediate. Could delay? Not necessary.
Draw particles after map, before player maybe.

Need game loop:
let last=performance.now();
function loop(now) { const dt=Math.min(0.033,(now-last)/1000||0); last=now; time += dt; update(dt); draw(); requestAnimationFrame(loop);}
requestAnimationFrame(loop);

Need draw:
function draw() {
ctx.clearRect...
drawBackground();
cameraX = ...;
ctx.save(); ctx.translate(-Math.floor(cameraX), 0);
drawTiles();
drawParticles();
drawEnemies();
drawPlayer();
ctx.restore();
drawHUD();
if(state==='won') drawVictory();
}
Need drawBackground with camera parallax:
const sky = ctx.createLinearGradient(0,0,0,HEIGHT); sky.addColorStop...
ctx.fillRect...
Draw sun at x=850 maybe. Clouds moving based on time. Mountains:
ctx.fillStyle '#263b5a'; path...
Maybe parallax:
for i clouds, x = ((i*230 + time*12) % (WIDTH+200)) - 100 - cameraX*0.15? But if inside translated? Better draw background before translate with camera. Use ctx.save no translate; draw parallax with -cameraX*0.2.
drawBackground:
ctx.fillRect...
ctx.save(); ctx.translate(-cameraX*0.18,0); draw distant mountains repeated; ctx.restore();
ctx.save(); ctx.translate(-cameraX*0.35,0); draw clouds; ctx.restore();
Need maybe draw grid? no.

Draw tiles:
const startCol=Math.floor(cameraX/TILE)-1, endCol=Math.ceil((cameraX+canvas.width)/TILE)+1.
for y 0..ROWS-1 for x start..end:
const ch=map[y][x]; if ch !== '.' drawTile(ch,x*TILE,y*TILE,x,y);
Need draw tile even if ch '.'? no.
DrawTile:
if ch==='#': drawBlock(x,y)
if ch==='T': drawTrophyTile(x,y)
if ch==='E': drawExitTile(x,y)
if ch==='W': drawWaterTile(x,y)
if ch==='F': drawFireTile(x,y)
Need map may contain only these.
DrawBlock:
const px=x*TILE,py=y*TILE;
ctx.fillStyle = '#6b3f24'; ctx.fillRect(px,py,TILE,TILE);
ctx.fillStyle = '#8b5a2b'; ctx.fillRect(px,py+5,TILE,TILE-5);
ctx.fillStyle = y===15? '#2f9f4a' : '#5d7a3b'? But platforms should grass top? Use tile y maybe. Draw top grass for any block if tile above not solid? Could:
ctx.fillStyle = '#3b2418'; fillRect px,py,TILE,TILE
ctx.fillStyle = '#8a552d'; fillRect px+2,py+4,TILE-4,TILE-4
ctx.fillStyle = '#4d301d'; fillRect px+4,py+18,TILE-8,2
ctx.fillStyle = '#2f9f4a'; fillRect px,py,TILE,5
ctx.fillStyle = '#6ccf58'; fillRect px+3,py+2,5,2 etc.
Add speckles deterministic:
const n=(x*13+y*7)%5; for i < n fill small.
Need maybe brick platforms if ch '#'. Fine.
DrawWaterTile:
px,py. ctx.fillStyle '#0b4d7a'; fillRect; gradient; wave lines with time:
ctx.strokeStyle '#5edcff'; lineWidth=2; beginPath; for x step 4 y=py+10+sin(time*4+x)*2; lineTo.
DrawFireTile:
px,py. Draw base dark; flames:
for i 0..2 offset deterministic, flame height = 18 + sin(time*8+i)*5; fill orange/red. Use path from bottom to tip.
DrawTrophyTile:
maybe draw tile background? Trophy stands on platform row4 below. Draw trophy centered at px+16, py+20.
ctx.fillStyle gold; cup shape.
DrawExitTile:
Door 1 tile wide, but for multiple rows, each tile draws segment. Need draw full door maybe only top tile? If draw each row, okay. For ch E:
px,py; ctx.fillStyle locked '#3b244a' or open '#1c6b35'; fillRect; stroke; draw door frame; if trophyTaken draw glow.
Since exit spans 3 rows, each tile draws segment. Maybe top tile has arch, middle knob. Good.
DrawTrophy if tile row3. Good.
DrawPlayer:
if invuln blinking: if Math.floor(time*12)%2===0 return? But if blink, still maybe draw translucent. Use ctx.globalAlpha = invuln>0 && blink ? .45 : 1.
Pixel art:
const x=Math.round(player.x), y=Math.round(player.y), w=player.w,h=player.h, dir=player.facing;
Draw shadow ellipse.
Legs: boots brown at bottom, body blue/red? Dave style: red cap, blue shirt, brown boots.
ctx.fillStyle '#1a1b2e'; fillRect x+4,y+16,10,10; body.
Head skin at y+5.
Cap red at y+2.
Arm facing.
Need maybe if carrying trophy, draw small trophy near player.
DrawEnemies:
Enemy maybe robot/guard. Use e.t for bob. Draw body red/brown, eye.
Need maybe draw enemy shadow.
DrawParticles:
for p life...
DrawHUD:
ctx.save(); ctx.font='16px Courier New'; ctx.textBaseline='top';
Draw semi-transparent panel at top left. Use roundRect helper.
Text:
Trophy: SECURED/SEEK
Exit: OPEN/LOCKED
Deaths: deaths
Message with messageTimer >0. Use maybe center top.
Need if messageTimer Infinity? For win, draw victory overlay.
Need maybe roundRect function:
function roundRect(ctx,x,y,w,h,r) { ... }
Need maybe use Path2D? simple.

DrawVictory:
if state==='won', overlay translucent, panel center with text.
Need maybe if state playing but messageTimer >0, draw message. messageTimer decrement in update.
function update(dt) { if(messageTimer>0 && messageTimer!==Infinity) messageTimer-=dt; updatePlayer; updateEnemies; updateParticles; }
Need if state won, still maybe update particles? Could not. But draw overlay.
Need maybe camera update even after win.
Need maybe state variable 'playing' or 'won'.
Need maybe resetGame on load.

Potential issue: buildLevel resets deaths each reset; if user presses R, deaths resets. Fine. Maybe user wants deaths count, reset. Good.
Need maybe "deaths" not meaningful if reset. Could count "runs"? But okay.
Need maybe if player touches exit locked, message. Good.
Need maybe if state won and user presses R, reset. Good.

Need maybe if window loses focus keys stuck; blur keys clear.
Need maybe prevent scroll with arrow/space. Good.

Need maybe canvas accessibility. Good.

Need maybe include "procedural graphics only" in page? Not necessary.

Need maybe ensure no external network. No links.

Let's craft code carefully. Need maybe use functions declarations before use. Since functions hoisted except const. We'll use function declarations.

Potential collision issue with player and fire:
tileRectOverlap uses floor(player.x/TILE), floor((player.x+player.w-0.01)/TILE). Fire tile at y14 x31. Player AABB y=454..480, floor y/TILE=14, floor (479.99/32)=14. Good.
Water tile at row16 x15-16. Player falling in pit, x maybe 480-544, y around 520, floor y/TILE=16, overlap W. Good.
Ground row15 absent at water x15-16, row16 W. Player falls through row15, then row16 W, kill. Good.
If player falls into gap x23-26, no water, row16 '.', tileAt y>=17 '.', falls below and kill. Good.
If player falls below, reset.
Need maybe if player collides with side of ground, tileAt x>=COLS solid. Good.

Potential issue with exit tile non-solid at x38 y12-14. Ground at x38 y15. Player can stand. Good.
Need maybe if player at x38, tileAt x38 y15 solid. If trying to go right, x>=COLS solid. Fine.
Need maybe if player is on exit floor x38, exit door at x38 y14, player y454..480, overlap with exit row14 y448..480. Good.
Need maybe if trophyTaken and player overlaps exit, win. If not, message.
Need maybe if player collides with exit tile? Non-solid, so can pass through. Good.

Potential issue with platform chain:
Spawn y=15*32-26=454, on ground row15 top 480. Good.
Platform x7 y12 top 384, diff 96. Jump height with JUMP -11.4, gravity .62: apex = v^2/(2g)=129.96/1.24=104.8 px. Need land top at 384, player bottom 480, diff 96, enough. Horizontal speed maybe 3.35, time to apex 18.4 frames, total to same height ~36.8 frames, to 96 px up maybe 26 frames, distance 87 px; platform x7 from spawn x=71? Platform x=224, distance 153 px, maybe not enough if jump from ground at x14? Need reach platform. Player can run on ground to x14 (right edge before pit) then jump to platform x7? Actually platform x7 is left of spawn, not right. To reach trophy, maybe go left? Start x=2, platform x7 is right, distance 153 from spawn to platform left edge, maybe jump distance 87 at platform height, too short. Need add closer platform or adjust. Maybe platform x5 y12 width3, then x9 y9, x13 y6, x19 y4. Let's set:
rect(5,12,3,1,'#');
rect(9,9,3,1,'#');
rect(13,6,3,1,'#');
rect(19,4,4,1,'#');
Then from spawn x2 to x5 distance 96, diff96, reachable. Good.
From x5 to x9 distance128, diff96, reachable maybe. From x9 to x13, etc. Good.
Need update map accordingly.
Need maybe platform x15 y6, trophy at x20 y3. Good.
Need maybe enemy on platform x9 y8? createEnemy(9,8,1) could be on platform y8? Platform at y9, enemy y=8*32+10=266, bottom 288, platform top 288, good. But if enemy on platform x9, player must avoid. Good. But platform x9 y9, enemy at y8. Good.
Need maybe right enemy x29. Good.
Need maybe platform x24 y8 for descent. Good.
Need maybe from trophy platform x19 y4 to platform x24 y8 (down). Good.
Need maybe platform x29 y11, x33 y13.
Need maybe ground x17-22. After trophy, can drop to ground x19-22. Good.

Need maybe gap from ground x17-22 to right ground x27-35: x23-26 four tile gap. Jump from x22 to x27 distance maybe 160, possible? Jump horizontal speed 3.35, duration maybe 36 frames, distance 120. Need maybe too far. Add platform x24 y12 width3 to cross? But right ground x27, platform x24 y12 can be stepping. From ground x17-22 to platform x24 y12: diff96, horizontal maybe 128, reachable. From platform x24 y12 to right ground x27-35: diff96, horizontal96, reachable. But we also have platform x24 y8 for descent from trophy; maybe too many. Could set rect(24,12,3,1,'#') instead of x24 y8? But descent from trophy platform x19 y4 to x24 y12 diff256 impossible. Need intermediate x24 y8. Then from x24 y8 to x29 y11 to x33 y13 to right ground. Good. After trophy, path down via platforms to right ground. Fine.
Need maybe from x33 y13 to ground x27-35, platform overlaps right ground, drop. Good.
Need maybe gap x23-26 not needed if platform path. But ground can also jump.

Need maybe water pit x15-16. Platform x13 y6, trophy platform x19 y4. Good.

Need maybe enemy on platform x9 y8 might block trophy path. Fine.

Need maybe draw map with camera. Good.

Potential issue with enemy collision and moveEntity:
moveEntity sets ent.onGround=false before y movement, then resolve y sets. For player, after x movement, onGround remains from previous frame until y movement. Jump check before move uses previous onGround. Good. After move, onGround set.
Need maybe if player stands on exit non-solid, onGround from floor. Good.

Potential issue with enemy edge detection after move: if e.vx set to 0 by wall, turn. If e falls off platform, tileBelowAhead not solid, turn, but if at edge, e may still fall. Since it turns before moving next frame, okay.
Need maybe if enemy falls into pit, tileBelowAhead '.' and turn, but may fall. Fine.

Potential issue with killPlayer:
function killPlayer(reason) {
if(state !== 'playing') return;
deaths++;
message=reason;
messageTimer=2.4;
spawnParticles...
resetPlayer();
}
resetPlayer sets invuln=1.2. Good.
Need maybe if hazard kills immediately after respawn? Player spawn not on hazard. Good.
Need maybe if enemy overlap at spawn? no.
Need maybe if player falls below, reset. Good.

Potential issue with particles update after kill: resetPlayer immediately, particles at old x. Good.

Need maybe use dt seconds for particles: p.life -= dt; p.x += p.vx*dt; p.y += p.vy*dt; p.vy += 500*dt. Good.
Need maybe spawnParticles color. Good.

Need maybe draw particles with globalAlpha. Good.

Need maybe high-DPI? Not necessary.

Need maybe use "imageSmoothingEnabled = false" after context. Good.

Need maybe use CSS width 100%, but canvas height scales. Good.

Need maybe no external resources. Good.

Need maybe file write. Let's craft full index.html. Use write.

→ write /tmp/ws/index.html (28996 bytes)

toolResult

Successfully wrote 28996 bytes to /tmp/ws/index.html

assistant

thinking

Need verify file exists maybe maybe no syntax errors? Could run maybe grep? We can use node to parse JS? Need maybe HTML. Could use node to extract script and check syntax. Use bash with node.

→ bash

{"command":"node --check <(python3 - <<'PY'\nfrom pathlib import Path\nimport re\nhtml=Path('/tmp/ws/index.html').read_text()\nm=re.search(r

toolResult

/bin/bash: line 1: python3: command not found node:fs:441 return binding.readFileUtf8(path, stringToFlags(options.flag)); ^ Error: ENOENT: no such file or directory, open '/proc/30/fd/pipe:[1361672]' at Object.readFileSync (node:fs:441:20) at node:internal/main/check_syntax:36:21 { errno: -2, code: 'ENOENT', syscall: 'open', path: '/proc/30/fd/pipe:[1361672]' } Node.js v24.18.1 Command exited with code 1

assistant

thinking

No python. Use node to parse file.

→ bash

{"command":"node - <<'NODE'\nconst fs=require('fs');\nconst html=fs.readFileSync('/tmp/ws/index.html','utf8');\nconst m=html.match(/<script>

toolResult

script syntax ok

assistant

thinking

Need maybe inspect file? Could maybe use ls.

→ bash {"command":"ls -l /tmp/ws/index.html"}

toolResult

-rw-r--r--. 1 node node 29002 Aug 1 20:35 /tmp/ws/index.html

assistant

thinking

Done — created the self-contained playable canvas platformer in: `/tmp/ws/index.html` It includes procedural graphics, tile-based movement/collision, trophy objective, locked exit, fire/water/pit hazards, patrol enemies, jumping, deaths/respawns, and no external assets or network requests.

TAKE IT TO CODE

A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.

RUN

modelnex-n2-pro

vendorNex AGI

harnesspi-agent

generated2026-08-01

EVALUATION

★★★★★ 3/5 partial

Platformer level renders with player, trophy, and enemies, but player position looks static across all inputs, suggesting limited movement response.

Vision grade · anthropic/claude-sonnet-5

MEASUREMENTS

Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.

idle motion3.4%

on click1.9%

on drag1.6%

on wheel1.9%

on enter + space1.8%

on arrow keys2.0%

on w/a/s/d1.6%

frame spread26.8 / 255

console errors0

js errors none

METRICS

runtime200.8s

tokens in39k

tokens out26k

cached84k

cost / run$0.0376