We need respond by creating index.html in /tmp/ws. Need build playable Asteroids game. Need inspect? Current dir /tmp/ws. Need create single self-contained file with CSS/JS inline no external. Need likely no need read. Need implement. Must end with index.html present. We need produce final concise with path. But should actually write file. Need think through game requirements.

Need create index.html. Need no external resources. Features:
- canvas full page
- thrust-and-rotate vector ship, shoots, wraps screen edges
- asteroids split into smaller pieces
- score/lives
- procedural vector graphics only
- playable.

Need robust code. We can write complete HTML. Need maybe include keyboard and touch controls? Nice. Single file.

Need ensure no external assets. Canvas vector. Need ship triangular with trails maybe. Asteroids polygonal vector. Splitting. Score and lives. Game loop.

Need implement:
- HTML with canvas id game, HUD overlay, start screen, pause?
- JS:
const canvas, ctx, DPR scaling.
state: running, paused, gameOver, keys, pointer/touch.
player object {x,y,vx,vy,angle,radius,invincible,thrusting,trail}
bullets array {x,y,vx,vy,life,r}
asteroids array {x,y,vx,vy,angle,spin,rad,points,vertices? maybe polygon}
score, lives, level maybe.
screen width,height CSS pixels and drawing scaled by dpr.

Need handle resize.

Asteroids:
generateAsteroid(radius, depth) with polygon vertices count random 9-14, jitter radius, center? Use angle offsets. Edges. Draw using ctx lines, maybe inner polygon.

Spawn asteroids maybe 4 at top right/left with radius max(100?) but responsive. On level start after player reset spawn count = 3+level? maybe if asteroids empty start new level.

Player:
- rotate left/right with A/D or arrows
- thrust W/up
- shoot Space/click/tap? Need avoid shoot on touch? Use pointer.
- bullets spawn at nose, speed + player velocity.
- wrap x,y.

Ship drawing:
- draw thruster flame if thrusting and not invincible maybe.
- rotate angle. triangle points nose (r,0), left(-r*0.7,r*0.7), right(-r*0.7,-r*0.7). Use shadow.

Scoring:
points = 100 for large, 50 medium, 20 small.
lives initial 3, decrement on collision with asteroid or bullet? User asked lives. Could include enemy bullets? Not necessary.
Collision:
- bullet vs asteroid. Asteroid radius maybe distance < asteroid.radius+bullet.radius. Remove bullet, split if > min. Score.
- player vs asteroid if invincible <= 0.5: if dist < player.radius+asteroid.radius*0.75? damage. Player loses life, reset, if lives>0 invincible. Else gameOver.
- asteroid vs asteroid maybe optional. Could implement.

Wrap edges:
function wrap(o) if x<-margin x=w+margin etc.

Input:
keydown prevent default for space/up etc. keyup.
Maybe touch controls: pointerdown starts game if not running; if playing set shoot true. pointerup shoot false.
On-screen buttons? Maybe not necessary but playable desktop. Could include instructions.

Game flow:
- Start screen overlay "Press Space/Click to Start".
- On start reset game, running true.
- main loop requestAnimationFrame.
- update(dt)
- draw.

Need handle dt cap to avoid huge leaps.

Need "procedural vector graphics only" means no images. We can draw all.

Need CSS in style tag. Good.

Need maybe no external fonts. Use system.

Need create file. Could write with heredoc via bash or write tool. Use write. Need ensure file present. Let's draft carefully.

Potential issue with Canvas DPR:
function resize() {
const rect = canvas.getBoundingClientRect();
canvas.width = Math.floor(rect.width * dpr);
canvas.height = Math.floor(rect.height * dpr);
ctx.setTransform(dpr,0,0,dpr,0,0);
W=rect.width; H=rect.height;
}
Call before drawing. Since ctx.setTransform each resize.

Need maybe overlay pointer-events none? Canvas full. HUD pointer-events none. Instructions.

Need start overlay pointer-events auto? Actually overlay div captures pointer. On click start. Could use startScreen.addEventListener('click', startGame). On mobile, click.

Need if game over overlay show restart. Could use same overlay.

Maybe maintain overlayContent.

Need code with no external.

Need maybe "single page web app" no assets. Good.

Let's create. Need maybe include accessibility? Not necessary.

Let's write file.

Need maybe inspect file? Need ensure present. Maybe run ls? Also maybe test? Use bash ls -l.