Top-down alien shooter · deepseek-v3.1-terminus

Using the pre-provided phaser.min.js (global Phaser), build a top-down alien shooter: move with WASD, aim and fire at waves of advancing aliens, with health, score, and increasing difficulty. Use ONLY procedurally generated graphics, no external image or audio assets.

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transcript · 75 messages

user

assistant

thinking

I'll start by checking the current directory to see what's available, particularly the phaser.min.js file.

→ bash {"command":"ls -la"}

toolResult

total 1156 drwxr-sr-x. 2 node node 27 Aug 1 17:37 . drwxrwsrwx. 3 root node 16 Aug 1 17:37 .. -rw-r--r--. 1 node node 1181917 Aug 1 17:37 phaser.min.js

assistant

thinking

Great. Now I'll write the index.html file with the complete game. I'll use Phaser 3, create a simple top-down shooter with player movement, aiming with mouse, shooting, aliens spawning in waves, health, score, and increasing difficulty. All graphics will be procedurally generated using Phaser's graphics API (draw circles, rectangles, etc.). I'll also generate sounds using the Web Audio API for simple beeps. Let's craft the HTML structure.

→ write index.html (13003 bytes)

toolResult

Successfully wrote 13003 bytes to index.html

assistant

thinking

Now I need to verify the file is there and maybe test quickly with a simple HTTP server. But we can also check that the file content is correct. Let's read the first few lines to confirm.

→ read {"path":"index.html","offset":1,"limit":10}

toolResult

assistant

thinking

The file looks good. However, there is a potential bug: the player graphics object is being redrawn each frame with a new angle based on mouse pointer, but the graphics object is also being used as a physics body. The drawPlayer method clears the graphics and redraws at the same coordinates, but the graphics object's position is determined by its x,y properties, not the drawing coordinates. Actually, when we draw a circle at (x, y) relative to the graphics object's origin, we need to offset. Currently we are drawing at (x, y) absolute, but the graphics object's position is also (x, y). That means we are drawing at world coordinates relative to graphics origin, which is fine because we set graphics.x and graphics.y? Wait, we never set graphics.x or graphics.y. The graphics object is a Game Object with its own transform. In Phaser 3, graphics.x and graphics.y are its position. We are using this.player.x and this.player.y which are the graphics object's coordinates. In drawPlayer we call graphics.fillCircle(x, y, 15) where x, y are the same as graphics.x and graphics.y? Actually we pass this.player.x, this.player.y as arguments, but those are the same as graphics.x and graphics.y. That means we are drawing a circle at (0,0) relative to the graphics origin? Let's examine: In create(), we do `this.player = this.add.graphics(); this.drawPlayer(this.player, 400, 300);`. The drawPlayer method uses the x and y arguments as coordinates for the circle, but the graphics object's position defaults to (0,0). The circle will be drawn at (400,300) in world coordinates because graphics uses world coordinate system? Actually graphics drawing is relative to its own position? In Phaser 3, when you call `graphics.fillCircle(400, 300, 15)`, you are drawing at world coordinates (400,300) irrespective of graphics position. The graphics position is separate; you can move the graphics container, but we never move it. We set physics body on the graphics object, and the body moves the graphics object's position. So we should draw at (0,0) relative to graphics, and then move the graphics object. Let's fix that. Also, we need to ensure that redrawing each frame doesn't cause performance issues, but it's fine for a small game.

Let's adjust: In drawPlayer, we should clear and draw at (0,0) relative to graphics, but we need to know the direction angle to draw the indicator relative to player. We'll compute angle between player position and mouse pointer, but we need to draw the indicator at offset from (0,0). However, the graphics object is at player's world position, so we can draw circle at (0,0) and the indicator at (cos*20, sin*20). That's fine.

Similarly for aliens and bullets: we should draw at (0,0) relative to their graphics object.

Let's rewrite the drawing functions accordingly. Also, we need to set the position of the graphics object after creating it. We'll set its x and y. Let's edit the file with these changes. We'll replace the entire script section with corrected version. Let's first read the whole file to see the exact script content, then we can replace. Let's do a backup read.

→ read {"path":"index.html","offset":60,"limit":150}

toolResult

assistant

thinking

We need to replace the script part entirely. Let's write a new version with corrected drawing. I'll create a new index.html with all changes. But to avoid duplication, we can edit the file with specific changes. However, the drawing functions are used in multiple places; we need to adjust each. Let's create a new version and replace the whole script block. We'll locate the script block start and end and replace it. Let's first get the exact lines from line 60 to end. Let's read from line 60 to end (maybe 200 lines). Use bash to count lines. Let's do:

→ bash {"command":"wc -l index.html"}

toolResult

359 index.html

assistant

thinking

We'll read from line 60 to line 359. Let's get the tail. Let's do with bash:

→ bash {"command":"tail -n +60 index.html > /tmp/tail.txt && head -n 300 /tmp/tail.txt"}

toolResult

#restart { margin-top: 20px; padding: 10px 20px; background: #f00; color: #000; border: none; font-size: 20px; cursor: pointer; font-family: monospace; } #restart:hover { background: #ff5555; } </style> </head> <body> <div id="ui"> <div>Health: <span id="health">100</span></div> <div>Score: <span id="score">0</span></div> <div>Wave: <span id="wave">1</span></div> <div>Aliens left: <span id="aliens">0</span></div> </div> <div id="instructions"> WASD to move<br> Mouse to aim, click to fire<br> Survive waves of aliens </div> <div id="game-over"> <div>GAME OVER</div> <div>Final Score: <span id="final-score">0</span></div> <button id="restart">Restart</button> </div> <div id="game-container"></div> <script> // Web Audio sound generator class SoundGenerator { constructor() { this.audioCtx = new (window.AudioContext || window.webkitAudioContext)(); this.gainNode = this.audioCtx.createGain(); this.gainNode.connect(this.audioCtx.destination); this.gainNode.gain.value = 0.1; // volume } beep(frequency, duration, type = 'sine') { if (this.audioCtx.state === 'suspended') this.audioCtx.resume(); const oscillator = this.audioCtx.createOscillator(); oscillator.connect(this.gainNode); oscillator.type = type; oscillator.frequency.setValueAtTime(frequency, this.audioCtx.currentTime); oscillator.start(); oscillator.stop(this.audioCtx.currentTime + duration); } shoot() { this.beep(800, 0.05, 'square'); } hit() { this.beep(200, 0.1, 'sawtooth'); } death() { this.beep(100, 0.3, 'sine'); } waveStart() { this.beep(600, 0.2, 'triangle'); this.beep(800, 0.2, 'triangle'); } } // Main game scene class GameScene extends Phaser.Scene { constructor() { super({ key: 'GameScene' }); this.player = null; this.cursors = null; this.aliens = null; this.bullets = null; this.health = 100; this.score = 0; this.wave = 1; this.aliensInWave = 5; this.aliensAlive = 0; this.aliensSpeed = 50; this.lastFired = 0; this.soundGen = null; this.gameOver = false; } preload() { // no external assets } create() { this.soundGen = new SoundGenerator(); this.soundGen.waveStart(); // world bounds this.physics.world.setBounds(0, 0, 800, 600); // player graphics this.player = this.add.graphics(); this.drawPlayer(this.player, 400, 300); this.physics.add.existing(this.player); this.player.body.setCollideWorldBounds(true); this.player.body.setDrag(300); this.player.body.setMaxSpeed(200); // aliens group this.aliens = this.physics.add.group(); // bullets group this.bullets = this.physics.add.group(); // input this.cursors = this.input.keyboard.createCursorKeys(); this.wasd = { up: this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.W), down: this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.S), left: this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.A), right: this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.D) }; this.input.on('pointerdown', this.shoot, this); // spawn first wave this.spawnWave(); // collisions this.physics.add.overlap(this.bullets, this.aliens, this.bulletHitAlien, null, this); this.physics.add.overlap(this.player, this.aliens, this.playerHit, null, this); // update UI this.updateUI(); } drawPlayer(graphics, x, y) { graphics.clear(); graphics.fillStyle(0x00ff00, 1); graphics.fillCircle(x, y, 15); graphics.lineStyle(2, 0x00aa00); graphics.strokeCircle(x, y, 15); // direction indicator const angle = Phaser.Math.Angle.Between(x, y, this.input.activePointer.worldX, this.input.activePointer.worldY); const px = x + Math.cos(angle) * 20; const py = y + Math.sin(angle) * 20; graphics.fillStyle(0xffff00, 1); graphics.fillCircle(px, py, 5); } drawAlien(graphics, x, y, size) { graphics.clear(); graphics.fillStyle(0xff0000, 1); graphics.fillCircle(x, y, size); graphics.lineStyle(2, 0xaa0000); graphics.strokeCircle(x, y, size); // eyes graphics.fillStyle(0xffffff, 1); graphics.fillCircle(x - size/2, y - size/3, size/3); graphics.fillCircle(x + size/2, y - size/3, size/3); graphics.fillStyle(0x000000, 1); graphics.fillCircle(x - size/2, y - size/3, size/6); graphics.fillCircle(x + size/2, y - size/3, size/6); } drawBullet(graphics, x, y) { graphics.clear(); graphics.fillStyle(0xffff00, 1); graphics.fillCircle(x, y, 3); graphics.lineStyle(1, 0xffaa00); graphics.strokeCircle(x, y, 3); } update(time) { if (this.gameOver) return; // player movement const speed = 200; this.player.body.setVelocity(0); if (this.wasd.up.isDown) this.player.body.setVelocityY(-speed); if (this.wasd.down.isDown) this.player.body.setVelocityY(speed); if (this.wasd.left.isDown) this.player.body.setVelocityX(-speed); if (this.wasd.right.isDown) this.player.body.setVelocityX(speed); // redraw player with aiming direction this.drawPlayer(this.player, this.player.x, this.player.y); // alien AI: move towards player this.aliens.getChildren().forEach(alien => { const angle = Phaser.Math.Angle.Between(alien.x, alien.y, this.player.x, this.player.y); const velocity = this.physics.velocityFromRotation(angle, this.aliensSpeed); alien.body.setVelocity(velocity.x, velocity.y); // redraw alien this.drawAlien(alien, alien.x, alien.y, 15); }); // update UI this.updateUI(); } shoot(pointer) { if (this.gameOver) return; const now = this.time.now; if (now - this.lastFired < 200) return; // fire rate limit this.lastFired = now; const bullet = this.add.graphics(); this.drawBullet(bullet, this.player.x, this.player.y); this.physics.add.existing(bullet); bullet.body.setCollideWorldBounds(true); bullet.body.onWorldBounds = true; this.bullets.add(bullet); const angle = Phaser.Math.Angle.Between(this.player.x, this.player.y, pointer.worldX, pointer.worldY); const speed = 400; this.physics.velocityFromRotation(angle, speed, bullet.body.velocity); this.soundGen.shoot(); // remove bullet after 2 seconds this.time.delayedCall(2000, () => { if (bullet.active) bullet.destroy(); }); } bulletHitAlien(bullet, alien) { bullet.destroy(); alien.destroy(); this.score += 10; this.aliensAlive--; this.soundGen.hit(); if (this.aliensAlive <= 0) { this.wave++; this.aliensInWave += 3; this.aliensSpeed += 10; this.soundGen.waveStart(); this.spawnWave(); } this.updateUI(); } playerHit(player, alien) { alien.destroy(); this.health -= 10; this.aliensAlive--; this.soundGen.hit(); if (this.health <= 0) { this.health = 0; this.gameOver = true; this.soundGen.death(); document.getElementById('final-score').textContent = this.score; document.getElementById('game-over').style.display = 'block'; } this.updateUI(); } spawnWave() { for (let i = 0; i < this.aliensInWave; i++) { const x = Phaser.Math.Between(50, 750); const y = Phaser.Math.Between(50, 550); const alien = this.add.graphics(); this.drawAlien(alien, x, y, 15); this.physics.add.existing(alien); alien.body.setCollideWorldBounds(true); this.aliens.add(alien); } this.aliensAlive = this.aliensInWave; this.updateUI(); } updateUI() { document.getElementById('health').textContent = this.health; document.getElementById('score').textContent = this.score; document.getElementById('wave').textContent = this.wave; document.getElementById('aliens').textContent = this.aliensAlive; } } // Game config const config = { type: Phaser.AUTO, width: 800, height: 600, parent: 'game-container', backgroundColor: '#111', physics: { default: 'arcade', arcade: { gravity: { x: 0, y: 0 }, debug: false } }, scene: GameScene }; const game = new Phaser.Game(config); // restart button document.getElementById('restart').addEventListener('click', () => { document.getElementById('game-over').style.display = 'none'; game.scene.getScene('GameScene').scene.restart(); }); </script> </body>

assistant

thinking

Now we need to replace the script block with corrected drawing. Let's write a new version of the script that draws relative to graphics origin and sets position. We'll keep the same structure but modify the drawing functions and the creation of graphics objects.

Let's create the new script content and replace from line 60 (the start of script) to the end of file. We'll do an edit with the exact old text of the script block. We'll need to capture the exact old text from the line `<script>` to `</script>`. Let's get the exact lines from line 60 to line 359 (the end). We'll use a more precise method: we'll write a new index.html with the corrected version. Since we already have the whole file, we can replace the whole file with a new one. That's easier.

Let's create the corrected HTML. We'll keep the same style and UI, but rewrite the script. Let's do it step by step. We'll write a new file and then replace. First, let's create a new content string. We'll copy the style and UI parts from the original file (lines before script). We'll read the first 60 lines to get them. Let's read lines 1-59.

→ read {"path":"index.html","offset":1,"limit":59}

toolResult

assistant

thinking

We have up to line 59, but we need to include the closing style tag and the body start. Let's read lines 60-80 to get the rest before script. Let's do a bash command to get lines 60-100. Let's do:

→ bash {"command":"sed -n '60,100p' index.html"}

toolResult

assistant

thinking

Great. So we can take everything before `<script>` (including the opening script tag) and replace the script content. We'll write a new file with the same header and footer but new script. Let's craft the new script.

We'll keep the SoundGenerator class unchanged. We'll modify GameScene's drawPlayer, drawAlien, drawBullet to draw at (0,0) relative to graphics, and set graphics position separately. Also we need to adjust the calls to those functions: they currently pass x,y as world coordinates, but we should set graphics.x and graphics.y and then draw at (0,0). Let's change:

- In create: `this.player = this.add.graphics(); this.player.x = 400; this.player.y = 300; this.drawPlayer(this.player);`

- drawPlayer(graphics) uses graphics.x and graphics.y to compute angle, but draws at (0,0). We'll also need to pass the mouse pointer world position (or we can get from this.input.activePointer). We'll compute angle between graphics position and pointer world position.

- Similarly for alien: we set alien.x and alien.y, then drawAlien(alien, size) draws at (0,0). The size can be stored as a property.

- For bullet: we set bullet.x and bullet.y, drawBullet(bullet).

We also need to update the redraw in update: we need to redraw player each frame because the direction indicator changes. We'll call drawPlayer(this.player). Similarly for aliens, we need to redraw each frame because they move (but graphics position changes automatically due to physics body; we still need to redraw eyes? Actually eyes are drawn relative to (0,0) and the alien graphic is a circle with eyes at fixed offsets; they don't need to be redrawn each frame because the alien graphic rotates? No, we don't need rotation. So we can draw alien once when created. However, we might want to redraw if size changes (maybe not). We'll keep redrawing for simplicity.

But note: redrawing each frame clears the graphics and redraws, which may cause flicker but should be fine.

Now, we need to adjust the velocityFromRotation for aliens: they already move towards player; we can keep that.

Now, we also need to ensure that the graphics body is correctly positioned. When we set graphics.x and graphics.y, the physics body's position should match? In Phaser, the graphics object's body position is the same as the graphics position. So setting graphics.x should update body.x. That's fine.

Let's write the new script.

We'll write the entire file now. Let's create a variable with the new content. I'll do it stepwise but we can just write the whole file. Let's do it in the edit tool. We'll replace the whole file. Let's construct the new HTML.

I'll write a new index.html with the corrected script. Let's do it now.

→ write index.html (13134 bytes)

toolResult

Successfully wrote 13134 bytes to index.html

assistant

thinking

Now we have the updated file. Let's test if there are any obvious bugs. Also, we should consider that the alien eyes are drawn relative to (0,0) but we might want them to stay oriented towards player? Not necessary.

Now we need to ensure the game works with the phaser.min.js file. The file is present in the same directory, so the script tag will load it.

We also need to make sure the game container size matches the config width/height. The container is a div with default dimensions? Actually Phaser will create a canvas inside the container with the given width/height. The container's border is styled, but we should set its width and height to match. Let's add CSS for #game-container width and height. We'll add width: 800px; height: 600px; to the style. Let's edit the style block. We'll do an edit to add those lines. Let's read the exact style block lines to locate the #game-container rule. Let's search with bash. Let's find the line number. Let's do:

→ bash {"command":"grep -n '#game-container' index.html"}

toolResult

21: #game-container {

assistant

thinking

Now let's read lines 21-25 to see the rule. Let's do:

→ read {"path":"index.html"}

toolResult

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Alien Shooter</title> <script src="phaser.min.js"></script> <style> body { margin: 0; padding: 0; display: flex; justify-content: center; align-items: center; min-height: 100vh; background: #000; font-family: monospace; color: #0f0; overflow: hidden; } #game-container { border: 2px solid #0f0; box-shadow: 0 0 20px #0f0; } #ui { position: absolute; top: 10px; left: 10px; color: #0f0; font-size: 18px; z-index: 10; background: rgba(0, 0, 0, 0.7); padding: 10px; border: 1px solid #0f0; } #instructions { position: absolute; bottom: 10px; right: 10px; color: #0f0; font-size: 14px; background: rgba(0, 0, 0, 0.7); padding: 10px; border: 1px solid #0f0; } #game-over { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: #f00; font-size: 48px; background: rgba(0, 0, 0, 0.9); padding: 30px; border: 3px solid #f00; text-align: center; display: none; z-index: 100; } #restart { margin-top: 20px; padding: 10px 20px; background: #f00; color: #000; border: none; font-size: 20px; cursor: pointer; font-family: monospace; } #restart:hover { background: #ff5555; } </style> </head> <body> <div id="ui"> <div>Health: <span id="health">100</span></div> <div>Score: <span id="score">0</span></div> <div>Wave: <span id="wave">1</span></div> <div>Aliens left: <span id="aliens">0</span></div> </div> <div id="instructions"> WASD to move<br> Mouse to aim, click to fire<br> Survive waves of aliens </div> <div id="game-over"> <div>GAME OVER</div> <div>Final Score: <span id="final-score">0</span></div> <button id="restart">Restart</button> </div> <div id="game-container"></div> <script> // Web Audio sound generator class SoundGenerator { constructor() { this.audioCtx = new (window.AudioContext || window.webkitAudioContext)(); this.gainNode = this.audioCtx.createGain(); this.gainNode.connect(this.audioCtx.destination); this.gainNode.gain.value = 0.1; // volume } beep(frequency, duration, type = 'sine') { if (this.audioCtx.state === 'suspended') this.audioCtx.resume(); const oscillator = this.audioCtx.createOscillator(); oscillator.connect(this.gainNode); oscillator.type = type; oscillator.frequency.setValueAtTime(frequency, this.audioCtx.currentTime); oscillator.start(); oscillator.stop(this.audioCtx.currentTime + duration); } shoot() { this.beep(800, 0.05, 'square'); } hit() { this.beep(200, 0.1, 'sawtooth'); } death() { this.beep(100, 0.3, 'sine'); } waveStart() { this.beep(600, 0.2, 'triangle'); this.beep(800, 0.2, 'triangle'); } } // Main game scene class GameScene extends Phaser.Scene { constructor() { super({ key: 'GameScene' }); this.player = null; this.cursors = null; this.aliens = null; this.bullets = null; this.health = 100; this.score = 0; this.wave = 1; this.aliensInWave = 5; this.aliensAlive = 0; this.aliensSpeed = 50; this.lastFired = 0; this.soundGen = null; this.gameOver = false; } preload() { // no external assets } create() { this.soundGen = new SoundGenerator(); this.soundGen.waveStart(); // world bounds this.physics.world.setBounds(0, 0, 800, 600); // player graphics this.player = this.add.graphics(); this.player.x = 400; this.player.y = 300; this.drawPlayer(this.player); this.physics.add.existing(this.player); this.player.body.setCollideWorldBounds(true); this.player.body.setDrag(300); this.player.body.setMaxSpeed(200); // aliens group this.aliens = this.physics.add.group(); // bullets group this.bullets = this.physics.add.group(); // input this.cursors = this.input.keyboard.createCursorKeys(); this.wasd = { up: this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.W), down: this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.S), left: this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.A), right: this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.D) }; this.input.on('pointerdown', this.shoot, this); // spawn first wave this.spawnWave(); // collisions this.physics.add.overlap(this.bullets, this.aliens, this.bulletHitAlien, null, this); this.physics.add.overlap(this.player, this.aliens, this.playerHit, null, this); // update UI this.updateUI(); } drawPlayer(graphics) { graphics.clear(); graphics.fillStyle(0x00ff00, 1); graphics.fillCircle(0, 0, 15); graphics.lineStyle(2, 0x00aa00); graphics.strokeCircle(0, 0, 15); // direction indicator const angle = Phaser.Math.Angle.Between(graphics.x, graphics.y, this.input.activePointer.worldX, this.input.activePointer.worldY); const px = Math.cos(angle) * 20; const py = Math.sin(angle) * 20; graphics.fillStyle(0xffff00, 1); graphics.fillCircle(px, py, 5); } drawAlien(graphics, size) { graphics.clear(); graphics.fillStyle(0xff0000, 1); graphics.fillCircle(0, 0, size); graphics.lineStyle(2, 0xaa0000); graphics.strokeCircle(0, 0, size); // eyes graphics.fillStyle(0xffffff, 1); graphics.fillCircle(-size/2, -size/3, size/3); graphics.fillCircle(size/2, -size/3, size/3); graphics.fillStyle(0x000000, 1); graphics.fillCircle(-size/2, -size/3, size/6); graphics.fillCircle(size/2, -size/3, size/6); } drawBullet(graphics) { graphics.clear(); graphics.fillStyle(0xffff00, 1); graphics.fillCircle(0, 0, 3); graphics.lineStyle(1, 0xffaa00); graphics.strokeCircle(0, 0, 3); } update(time) { if (this.gameOver) return; // player movement const speed = 200; this.player.body.setVelocity(0); if (this.wasd.up.isDown) this.player.body.setVelocityY(-speed); if (this.wasd.down.isDown) this.player.body.setVelocityY(speed); if (this.wasd.left.isDown) this.player.body.setVelocityX(-speed); if (this.wasd.right.isDown) this.player.body.setVelocityX(speed); // redraw player with aiming direction this.drawPlayer(this.player); // alien AI: move towards player this.aliens.getChildren().forEach(alien => { const angle = Phaser.Math.Angle.Between(alien.x, alien.y, this.player.x, this.player.y); const velocity = this.physics.velocityFromRotation(angle, this.aliensSpeed); alien.body.setVelocity(velocity.x, velocity.y); // redraw alien (optional, but keep eyes oriented) this.drawAlien(alien, 15); }); // update UI this.updateUI(); } shoot(pointer) { if (this.gameOver) return; const now = this.time.now; if (now - this.lastFired < 200) return; // fire rate limit this.lastFired = now; const bullet = this.add.graphics(); bullet.x = this.player.x; bullet.y = this.player.y; this.drawBullet(bullet); this.physics.add.existing(bullet); bullet.body.setCollideWorldBounds(true); bullet.body.onWorldBounds = true; this.bullets.add(bullet); const angle = Phaser.Math.Angle.Between(this.player.x, this.player.y, pointer.worldX, pointer.worldY); const speed = 400; this.physics.velocityFromRotation(angle, speed, bullet.body.velocity); this.soundGen.shoot(); // remove bullet after 2 seconds this.time.delayedCall(2000, () => { if (bullet.active) bullet.destroy(); }); } bulletHitAlien(bullet, alien) { bullet.destroy(); alien.destroy(); this.score += 10; this.aliensAlive--; this.soundGen.hit(); if (this.aliensAlive <= 0) { this.wave++; this.aliensInWave += 3; this.aliensSpeed += 10; this.soundGen.waveStart(); this.spawnWave(); } this.updateUI(); } playerHit(player, alien) { alien.destroy(); this.health -= 10; this.aliensAlive--; this.soundGen.hit(); if (this.health <= 0) { this.health = 0; this.gameOver = true; this.soundGen.death(); document.getElementById('final-score').textContent = this.score; document.getElementById('game-over').style.display = 'block'; } this.updateUI(); } spawnWave() { for (let i = 0; i < this.aliensInWave; i++) { const x = Phaser.Math.Between(50, 750); const y = Phaser.Math.Between(50, 550); const alien = this.add.graphics(); alien.x = x; alien.y = y; this.drawAlien(alien, 15); this.physics.add.existing(alien); alien.body.setCollideWorldBounds(true); this.aliens.add(alien); } this.aliensAlive = this.aliensInWave; this.updateUI(); } updateUI() { document.getElementById('health').textContent = this.health; document.getElementById('score').textContent = this.score; document.getElementById('wave').textContent = this.wave; document.getElementById('aliens').textContent = this.aliensAlive; } } // Game config const config = { type: Phaser.AUTO, width: 800, height: 600, parent: 'game-container', backgroundColor: '#111', physics: { default: 'arcade', arcade: { gravity: { x: 0, y: 0 }, debug: false } }, scene: GameScene }; const game = new Phaser.Game(config); // restart button document.getElementById('restart').addEventListener('click', () => { document.getElementById('game-over').style.display = 'none'; game.scene.getScene('GameScene').scene.restart(); }); </script> </body> </html>

assistant

thinking

Great. Now we need to add width and height to #game-container. Let's edit the style block. We'll replace that rule. Let's find the exact lines: we have lines 21-23. Let's write an edit that replaces the whole rule with a new one. We'll need to match exactly the old text. Let's capture the exact text:

`        #game-container {
            border: 2px solid #0f0;
            box-shadow: 0 0 20px #0f0;
        }`

We'll replace with:

`        #game-container {
            width: 800px;
            height: 600px;
            border: 2px solid #0f0;
            box-shadow: 0 0 20px #0f0;
        }`

Make sure indentation matches (8 spaces). Let's do the edit.

→ edit

{"edits":[{"newText":"        #game-container {\n            width: 800px;\n            height: 600px;\n            border: 2px solid #0f0;\

toolResult

Successfully replaced 1 block(s) in index.html.

assistant

thinking

Now we should also consider that the player's drag and maxSpeed may not be needed; we can keep. Also, the alien speed increase per wave might be too low; we can adjust later.

Now we have a fully self-contained HTML file with inline CSS and JS, using only the provided phaser.min.js. Let's verify that the file loads correctly by checking if there are any syntax errors. We can also run a quick test by opening it in a browser headless? Not possible. But we can at least check that the script doesn't have obvious errors. We'll also add some extra features like visual feedback when player is hit, maybe screen flash. But the requirement is just a top-down alien shooter with health, score, increasing difficulty. We have that.

Let's also consider that the aliens should not overlap each other too much. That's fine.

Now, we should also ensure that the bullets are removed when they go off world bounds. We already have bullet.body.onWorldBounds = true but we need to handle the event. Actually we need to enable debug for world bounds? Instead we can just destroy bullet when it leaves world bounds. We can set bullet.body.collideWorldBounds = true (already) and then listen to worldbounds event? Simpler: we already have a delayed destruction after 2 seconds, which is enough. But if bullet hits world bounds it will bounce? Not with collideWorldBounds true, it will stop. We'll set bounce to 0. Actually we don't want bounce. We'll just let them stop at edge, but they'll be destroyed after 2 seconds anyway. That's fine.

Now, we should also maybe add a visual effect when alien is hit, like a small explosion (draw a circle that expands and fades). We'll add a simple particle effect using graphics. But we can keep it minimal.

Given time, let's add a simple explosion graphic that appears when alien is hit and disappears quickly. We'll create a new method `createExplosion(x,y)`. We'll add an explosions group and update them. However, we must keep it simple.

Alternatively, we can add a screen flash when player is hit. Let's add a red overlay that fades quickly. We'll create a rectangle graphics over the camera.

Let's implement both: explosion for alien death, red flash for player hit.

We'll add a new group for explosions, each explosion is a graphics object that grows and fades out, then destroyed.

We'll also add a red flash overlay that fades.

We'll need to modify the script accordingly. Let's do it stepwise. We'll edit the script section. Since we have many changes, we'll replace the whole script block again, but we can also edit specific functions. Let's create a new version of the script with added features. We'll keep the existing code and add new methods and properties.

We'll add to GameScene constructor:

`this.explosions = null;`

In create:

`this.explosions = this.add.group();`

Add method `createExplosion(x, y)`.

In bulletHitAlien and playerHit (when alien destroyed) we'll call createExplosion.

Also add `flashRed()` for player hit.

Let's write the new script block. We'll replace from `<script>` to `</script>` inclusive. Let's first copy the entire script block lines from the file. We'll write a new script block and replace using edit with the exact old script block. Let's get the exact old text from the file. We'll extract lines from line 60 (the line with `<script>`) to line 359 (the end). Let's do with bash to get the exact block. Let's write a small script to capture lines between `<script>` and `</script>` inclusive. Let's do:

→ bash {"command":"sed -n '/^ <script>/,/^ <\\/script>/p' index.html"}

toolResult

assistant

thinking

Great. Now we need to replace that entire block with a new one that includes explosions and flash. Let's craft the new script. We'll keep the same structure but add:

- In constructor: `this.explosions = null; this.flash = null;`
- In create: `this.explosions = this.add.group(); this.flash = this.add.graphics(); this.flash.fillStyle(0xff0000, 0); this.flash.fillRect(0, 0, 800, 600); this.flash.setDepth(1000);`
- Method `createExplosion(x, y)` creates a graphics object, adds to explosions group, animates scale and alpha over time, then destroys.
- Method `flashRed()` sets flash alpha to 0.5 and tween to 0.
- Call createExplosion in bulletHitAlien and playerHit (when alien destroyed). Call flashRed in playerHit.

We'll also need to update the explosion graphics each frame. We'll add an update loop for explosions.

Let's write the new script block. We'll do this by writing a new file and replacing the whole index.html again, but we can just replace the script block. Let's edit with the exact old text we just captured. We'll need to ensure we have the exact old text with proper line endings. We'll use the edit tool with the oldText being the entire script block (including the surrounding spaces). Let's copy the exact oldText from the file from `<script>` to `</script>` inclusive, with the exact indentation (4 spaces before script). We'll use the captured output above but note that the captured output includes leading spaces? The sed output includes exactly 4 spaces at the start of each line? Actually the lines start with 4 spaces? Let's check the first line: "    <script>" has 4 spaces. We'll need to include those. The captured output includes those spaces because of the sed command. Good. So we can use the entire captured output as oldText. However, there may be trailing newline? We'll include the whole block up to the closing script line.

Let's write newScript variable with the same indentation. We'll create it in a separate step. Let's write a new script content in a separate file and then replace. But we can embed it here. Let's do edit with a large replacement. We'll construct newScript string in the edit call. Might be large but okay.

Let's construct newScript line by line. We'll do it in Python? Not. Let's just write a new index.html with all changes and replace the entire file. That's easier. We already have the entire HTML except the script block. Let's create the new HTML by concatenating the prefix (up to `<script>`), new script, and suffix (after `</script>`). Let's extract prefix and suffix using bash again.

Let's get lines before script. Let's find line number of `<script>`. Let's do:

→ bash {"command":"grep -n '<script>' index.html"}

toolResult

96: <script>

assistant

thinking

Now get lines 1 to 95 as prefix. Let's get lines after `</script>`. Let's find line number of `</script>`.

→ bash {"command":"grep -n '</script>' index.html"}

toolResult

7: <script src="phaser.min.js"></script> 366: </script>

assistant

thinking

We need the second one at line 366. So suffix is from line 367 to end. Let's get total lines: 359? Wait we have 366 lines now after adding width/height. Let's count again. Let's do `wc -l index.html`.

→ bash {"command":"wc -l index.html"}

toolResult

367 index.html

assistant

thinking

Good. So suffix lines 367-367? Actually line 367 is the closing body tag? Let's see. Let's get lines 367-367. Let's do `sed -n '367,367p' index.html`. Let's do:

→ bash {"command":"sed -n '367,367p' index.html"}

toolResult

</body>

assistant

thinking

So suffix is `</body>` and `</html>` after that? Let's get lines 367-368. Let's do:

→ bash {"command":"sed -n '367,368p' index.html"}

toolResult

</body> </html>

assistant

thinking

Great.

Now we can construct new HTML: prefix + newScript + suffix. Let's write prefix and suffix files. Let's do using bash to write them to temp files. Let's do:

→ bash {"command":"head -n 95 index.html > /tmp/prefix.html"}

toolResult

(no output)

assistant

thinking

Now suffix from line 367 to end:

→ bash {"command":"tail -n +367 index.html > /tmp/suffix.html"}

toolResult

(no output)

assistant

thinking

Now we need to create newScript. Let's write it in a separate file and then concatenate. Let's write newScript with our additions. We'll create a file /tmp/newscript.html. Let's do it stepwise using a heredoc in bash but we can use write tool. Let's write the new script content using write tool into a temporary file, then use bash to cat. Let's create newScript content in this response. We'll need to be careful about escaping. Let's just write the whole new index.html with the new script. That's simpler: we'll create a new index2.html and then replace index.html.

Let's write the whole HTML with the new script. We'll copy the prefix and suffix as strings and insert new script. Let's do it in one go using write. We'll construct the content string in Python? We'll just manually write the new script block and embed it. Let's do edit of the whole file again, but we already have the whole file content in memory from earlier read. Let's just produce the new version now.

I'll write the new script block here and then replace the whole file. Let's start with the prefix lines (first 95 lines). Let's read them to ensure we have them. Let's read prefix.html content. Let's do:

→ read {"path":"/tmp/prefix.html"}

toolResult

assistant

thinking

Great. Now suffix:

→ read {"path":"/tmp/suffix.html"}

toolResult

</body> </html>

assistant

thinking

Now we need to create the new script. Let's write it now. We'll incorporate the additions. We'll keep the same SoundGenerator class. We'll modify GameScene. Let's write the script block with all changes. We'll do it in a single write. Let's create the new index.html content by concatenating prefix + newScript + suffix. Let's do it via bash: we can write newScript to a file and cat. Let's use write tool to write newScript content to a temporary file, then cat them together. Let's first write newScript to /tmp/newscript.html. Let's write the script content now. Let's start with the script block exactly as before but with modifications. We'll write it stepwise but we need to embed it in a write call. Let's create the new script content as a string. We'll do it in the next edit. Let's create a new file for the whole index.html with the new script. We'll write the entire HTML again, but we'll just replace the script block using edit with the old script block we captured earlier. That's simpler: we have the old script block text; we can replace it with new script block text. We'll do edit with oldText being the entire script block we captured (including the surrounding spaces). We'll need to ensure the oldText matches exactly. Let's copy the exact oldText from the file using a more precise method: we can get the lines from line 96 to line 366 inclusive. Let's do:

→ bash {"command":"sed -n '96,366p' index.html > /tmp/oldscript.txt"}

toolResult

(no output)

assistant

thinking

Now we can read that file to get the exact oldText. Let's read it:

→ read {"path":"/tmp/oldscript.txt"}

toolResult

assistant

thinking

Perfect. Now we need to create newScript with added explosion and flash features. Let's write newScript content. We'll do it in a separate file and then replace. Let's use write to create newScript.txt then replace. We'll embed the new script block.

Given the length, we'll edit the file by replacing the oldScript with newScript. Let's craft newScript now. We'll keep the same structure but add the new properties and methods. We'll also adjust bulletHitAlien and playerHit to call createExplosion. We'll also call flashRed in playerHit.

Let's write the new script block. We'll do it stepwise but we'll output the whole block. Let's write it in a separate editor and then copy. We'll use the write tool to create a temporary file, then read it to verify. Let's do it in the current directory. Let's write a file newScript.js (just content). Let's do:

→ write newScript.js (12190 bytes)

toolResult

Successfully wrote 12190 bytes to newScript.js

assistant

thinking

Now we need to wrap this script block with the `<script>` tags and proper indentation (4 spaces). Let's create the final script block: we need to prepend "    <script>\n" and append "\n    </script>". The newScript.js content already has leading spaces? It has 8 spaces for each line? Actually each line is indented with 8 spaces? Let's examine. The first line has no leading spaces. We need to add 8 spaces before each line (since the script block is indented by 4 spaces from the body, and the script content is indented by 8 spaces relative to the html). In our old script block, each line had 8 spaces? Actually the old script block lines started with 8 spaces? Let's look at the first line of the old script block: "        // Web Audio sound generator". That's 8 spaces. Indeed, the script tag is indented by 4 spaces, and the content inside is indented by 8 spaces. So we need to add 8 spaces before each line of our newScript.js. Let's do that with sed. Let's create the final script block file. Let's do:

→ bash {"command":"sed 's/^/ /' newScript.js > /tmp/newscript_indented.txt"}

toolResult

(no output)

assistant

thinking

Now we need to add the `<script>` and `</script>` lines. Let's create the final script block file:

→ bash

{"command":"echo '    <script>' > /tmp/final_script.txt && cat /tmp/newscript_indented.txt >> /tmp/final_script.txt && echo '    </script>'

toolResult

(no output)

assistant

thinking

Now we have final_script.txt. Let's verify the first few lines:

→ read {"path":"/tmp/final_script.txt","offset":1,"limit":10}

toolResult

assistant

thinking

Oops, the indentation doubled because the original lines already had 8 spaces? Wait, newScript.js lines had no leading spaces. But we added 8 spaces, but the sed added 8 spaces before each line, but the lines already had 8 spaces? Let's check newScript.js first line: no spaces. However, the displayed lines show double indentation because the file already had 8 spaces? Actually the first line of newScript.js is "// Web Audio sound generator". No spaces. The output shows "        // Web Audio sound generator". That's 8 spaces. That's correct. However, the next line "        class SoundGenerator {" appears with 16 spaces because the line in newScript.js had 8 spaces? Let's examine newScript.js line 2: maybe there are leading spaces? Let's check with cat -A. Let's do quickly:

→ bash {"command":"head -2 newScript.js | cat -A"}

toolResult

// Web Audio sound generator$ class SoundGenerator {$

assistant

thinking

Ah! The second line already has 8 spaces. Indeed, because we wrote the script with indentation (8 spaces) in the write call. That's because we copied from the old script block and kept the indentation? Actually we wrote the new script content with 8 spaces? Let's look at the raw newScript.js content. The first line no spaces, second line 8 spaces, third line maybe 12? Actually we need to ensure the entire script block lines have exactly 8 spaces relative to the html. The simplest is to replace the old script block with new script block that has exactly the same indentation as old. We can just use the old script block as a template and modify the class definition. But we can also strip all leading spaces from newScript.js and then add 8 spaces uniformly. Let's do that. Let's create a version with normalized indentation. Let's use sed to remove leading spaces from each line, then add 8 spaces. Let's do:

→ bash {"command":"sed 's/^[[:space:]]*//' newScript.js | sed 's/^/ /' > /tmp/newscript_norm.txt"}

toolResult

(no output)

assistant

thinking

Now create final script block with proper tags:

→ bash

{"command":"echo '    <script>' > /tmp/final_script2.txt && cat /tmp/newscript_norm.txt >> /tmp/final_script2.txt && echo '    </script>' >>

toolResult

(no output)

assistant

thinking

Now we need to replace the old script block in index.html with the content of final_script2.txt. We'll read the old script block lines (96-366) and replace them with the new lines. Let's read the entire index.html, split into three parts: lines 1-95, new script block, lines 367-end. We'll concatenate them. Let's do with bash. First, create prefix file (lines 1-95) we already have. Let's create suffix file lines 367-end. We'll use tail with line numbers. Let's compute total lines: 367. So suffix lines from 367 to end. Let's create suffix file:

→ bash {"command":"tail -n +367 index.html > /tmp/suffix2.html"}

toolResult

(no output)

assistant

thinking

Now concatenate prefix, final_script2.txt, suffix. Let's do:

→ bash {"command":"cat /tmp/prefix.html /tmp/final_script2.txt /tmp/suffix2.html > /tmp/new_index.html"}

toolResult

(no output)

assistant

thinking

Now replace index.html with new_index.html. Let's read a snippet to ensure it's correct. Let's check line count:

→ bash {"command":"wc -l /tmp/new_index.html"}

toolResult

413 /tmp/new_index.html

assistant

thinking

Now we need to ensure there are no extra blank lines. Let's copy over the original file. Let's write new_index.html to index.html.

→ bash {"command":"cp /tmp/new_index.html index.html"}

toolResult

(no output)

assistant

thinking

Now verify that the file is valid HTML. Let's check that the script block contains our new methods. Let's grep for createExplosion:

→ bash {"command":"grep -n createExplosion index.html"}

toolResult

306: createExplosion(x, y) { 333: this.createExplosion(alien.x, alien.y); 350: this.createExplosion(alien.x, alien.y);

assistant

thinking

Great. Now also check that flashRed appears. Let's grep:

→ bash {"command":"grep -n flashRed index.html"}

toolResult

318: flashRed() { 351: this.flashRed();

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

modeldeepseek-v3.1-terminus

vendorDeepSeek

harnesspi-agent

generated2026-08-01

EVALUATION

★★★★★ 3/5 working

Top-down shooter with player, aliens spawning in waves, and HUD; player moves slightly with WASD but aliens all die off quickly with no shots visible.

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 motion0.5%

on click0.1%

on drag0.0%

on wheel0.0%

on enter + space0.0%

on arrow keys0.0%

on w/a/s/d0.1%

frame spread14 / 255

console errors0

js errors none

METRICS

runtime600.1s

tokens in789k

tokens out17k

cached518k

cost / run$0.1597