Asteroids · qwen3.5-plus-20260420
Build a playable Asteroids game on a canvas: a thrust-and-rotate vector ship that shoots and wraps around the screen edges, splitting asteroids into smaller pieces, with score and lives. Procedural vector graphics only, no external assets.
transcript · 10 messages
Build a playable Asteroids game on a canvas: a thrust-and-rotate vector ship that shoots and wraps around the screen edges, splitting asteroids into smaller pieces, with score and lives. Procedural vector graphics only, no external assets.
thinking
The user wants a complete Asteroids game in a single HTML file. Let me build this with: 1. HTML5 Canvas for rendering 2. Vector graphics (lines/shapes) - no images or external assets 3. Ship mechanics: thrust, rotation, shooting 4. Asteroids that split when hit (large → medium → small) 5. Screen wrapping for ship and bullets 6. Score tracking and lives 7. Game states (start, playing, game over) Let me design this carefully: **Ship:** - Triangle vector shape - Rotate with left/right arrow keys - Thrust with up arrow (accelerate in facing direction) - Shoot with spacebar - Wrap around screen edges **Asteroids:** - Irregular polygon shapes (procedurally generated) - 3 sizes: large, medium, small - Move in random directions - When shot: split into 2-3 smaller pieces - Collision with ship = lose life **Bullets:** - Travel in ship's facing direction - Limited lifespan - Wrap around screen **UI:** - Score display - Lives (ship icons) - Level indicator (asteroids get faster over time) Let me write this complete game.
/tmp/ws/index.html (12578 bytes)Successfully wrote 12578 bytes to /tmp/ws/index.html
thinking
The file has been written. Let me verify it exists and is complete.
{"command":"ls -la /tmp/ws/index.html && wc -l /tmp/ws/index.html"}-rw-r--r--. 1 node node 12578 Aug 1 19:45 /tmp/ws/index.html 483 /tmp/ws/index.html
thinking
The user wants me to build a playable Asteroids game. Let me create a comprehensive single-file HTML game with all the classic features. Let me build this properly with good game mechanics.
/tmp/ws/index.html (16675 bytes)Successfully wrote 16675 bytes to /tmp/ws/index.html
thinking
Let me verify the file looks correct and complete.
{"command":"wc -l /tmp/ws/index.html && head -5 /tmp/ws/index.html && echo \"---\" && tail -5 /tmp/ws/index.html"}608 /tmp/ws/index.html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> --- loop(); })(); </script> </body> </html>
thinking
The file is written and complete. Let me verify it's a valid self-contained HTML file with all the game features.
The `index.html` file is ready at `/tmp/ws/index.html`. Here's what's included: **Gameplay:** - **Vector ship** — triangle shape with thrust flame and glow effect - **Controls:** Arrow keys or WASD to rotate/thrust, Space to shoot - **Screen wrapping** for ship, bullets, and asteroids - **Asteroid splitting** — large (3) → medium (2) → small (1), each with different point values (20/50/100) - **Lives system** — 3 lives with ship icons in HUD; invincibility frames with blinking after respawn - **Progressive difficulty** — more and faster asteroids each level **Visual effects (all procedural vector graphics):** - Twinkling star field background - Particle system for thrust flames, asteroid explosions, and death effects - Screen shake on big asteroid hits and ship damage - Bullet glow, ship glow, flame flicker - Pulsing text animations on title/game over screens **HUD:** Score, level, and lives display. Title screen with floating demo asteroids, and a game over screen with final score.
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
EVALUATION
Vector Asteroids with menu, ship, asteroids, and level start work; ship visibly rotates/moves with arrows and WASD.
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.