Asteroids · gemini-3.5-flash-lite
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
**Defining the Asteroids Game** Okay, I'm setting the scope. The goal is a playable Asteroids game. I'm focusing on getting the core functionality – ship movement, asteroid generation, and basic collision – running in a single HTML file. The CSS and Javascript will be inline.
{"command":"ls -la"}total 0 drwxr-sr-x. 2 node node 6 Aug 1 17:31 . drwxrwsrwx. 3 root node 16 Aug 1 17:31 ..
thinking
**Initiating Game Design** Okay, I'm starting from scratch; the directory is empty. My focus is on crafting an exceptional Asteroids game, starting with the `index.html` file. I'm prioritizing the visual design – aiming for a classic vector arcade look. Specifically, I'm envisioning a deep, dark space background and vibrant neon vectors to define the game's aesthetic. I've settled on dark hex colors such as `#0a0a12` or `#050505`. **Refining Visual Elements** I'm now zeroing in on the visual details. I'm thinking of using colors like `#00ffcc` or `#fff` for the ship, `#ff3366` or `#ffcc00` for asteroids, and `#00ffff` for bullets. Particle sparks, with glowing shadow/line effects using canvas `strokeStyle`, `shadowBlur`, and `shadowColor`, will add to the aesthetic. **Adding Game Mechanics** I'm now integrating crucial gameplay elements. I'm imagining UFOs, both large and small, randomly or intentionally shooting at the player, which significantly enhances the classic arcade vibe. I've designed a wave system that advances with asteroid clearing, boosting the number and velocity of the asteroids. I'm also planning the UI/HUD: score, high score (local storage), lives (ship icons), and level/wave number.
index.html (40143 bytes)Successfully wrote 40143 bytes to index.html
{"command":"node -c index.html"}node:internal/modules/esm/get_format:236 throw new ERR_UNKNOWN_FILE_EXTENSION(ext, filepath); ^ TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".html" for /tmp/ws/index.html at Object.getFileProtocolModuleFormat [as file:] (node:internal/modules/esm/get_format:236:9) at defaultGetFormat (node:internal/modules/esm/get_format:262:36) at checkSyntax (node:internal/main/check_syntax:67:20) { code: 'ERR_UNKNOWN_FILE_EXTENSION' } Node.js v24.18.1 Command exited with code 1
{"command":"node -e \"\nconst fs = require('fs');\nconst html = fs.readFileSync('index.html', 'utf8');\nconst scriptMatch = html.match(/<scrJS syntax OK!
I have built a fully playable, feature-rich **Asteroids** arcade game in a single self-contained `index.html` file. ### Features Included: - **Vector Arcade Aesthetic**: Deep space background with neon vector glowing lines (`#00ffcc` ship, `#ffcc00` asteroids, `#00ffff` bullets, `#ff3366` UFOs, and particle effects). - **Thrust & Rotate Ship Mechanics**: Smooth inertia/momentum physics with dampening, screen wrapping, thruster particle flames, and hyperspace jump (Shift/S). - **Procedurally Generated Jagged Asteroids**: Three sizes (Large, Medium, Small) that split into smaller pieces when shot, complete with score tracking per asteroid size. - **Bonus UFO Saucers**: Occasionally spawn across the screen, shooting back at the player. - **Procedural Audio (Web Audio API)**: Zero external assets or network requests — synthesizes laser shots, roaring rocket thrust, explosions, and hyperspace swooshes natively. - **HUD & High Scores**: Persistent high score stored in `localStorage`, wave progression tracking, and mini vector ship life indicators. - **Controls**: - **Rotate**: Left/Right Arrow keys or `A`/`D` - **Thrust**: Up Arrow key or `W` - **Fire**: Spacebar - **Hyperspace**: Shift or `S` - **Pause**: `P` - Fully responsive with touch on-screen controls for mobile/tablet play.
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 game starts with menu, keyboard input launches game showing ship, asteroids, wave and lives HUD; mouse inputs had no effect.
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.