game-creator

Go from game idea to deployed, monetized browser game in minutes — not hours.

Tell your AI coding agent "make a space invaders game" and get a fully playable 2D or 3D browser game with pixel art, procedural audio, and automated QA. Deploy instantly to the web. Monetize with Play.fun. Share on Moltbook.

Works with 40+ AI coding agents — Claude Code, Cursor, Windsurf, Cline, and more via npx skills add.

Owner: OpusGameLabs

Install

npx skills add OpusGameLabs/game-creator

Target a specific agent:

npx skills add OpusGameLabs/game-creator -a claude-code
npx skills add OpusGameLabs/game-creator -a cursor
npx skills add OpusGameLabs/game-creator -a codex
npx skills add OpusGameLabs/game-creator -a antigravity

Quick Start

# Build a complete 2D game (scaffold → pixel art → design → audio → deploy → monetize)
# QA subagent runs after every step (build, runtime, gameplay, architecture, visual)
/game-creator:make-game 2d my-game

# Build from a tweet
/game-creator:make-game https://x.com/user/status/123456

# Or run individual steps on an existing game:
/game-creator:add-assets          # Replace shapes with pixel art sprites
/game-creator:design-game         # Add visual polish (particles, juice, transitions)
/game-creator:add-audio           # Add chiptune music and sound effects
/game-creator:add-feature jetpack # Add a gameplay feature
/game-creator:improve-game        # Audit + implement highest-impact improvements
/game-creator:monetize-game       # Register on Play.fun, add SDK, get monetized URL
/game-creator:review-game         # Code review for architecture + best practices
/game-creator:qa-game             # Add Playwright QA tests

How It Works

/make-game is an orchestrator that delegates all code writing to subagents and runs a QA subagent after every code-modifying step:

Step 0  Parse args, create task list                           ← main thread
Step 1  Scaffold game from template                            ← code subagent → QA subagent
Step 1.5 Add pixel art sprites (2D only)                       ← code subagent → QA subagent
Step 2  Visual polish (particles, juice, transitions)          ← code subagent → QA subagent
Step 3  Audio (Strudel.cc BGM + SFX)                           ← code subagent → QA subagent
Step 4  Deploy to here.now                                     ← main thread (instant publish)
Step 5  Monetize with Play.fun                                 ← main thread (interactive auth)

The QA subagent runs 5 phases per step: build check, runtime check (headless Chromium), gameplay verification (iterate client with game-specific actions), architecture validation, and visual review (Playwright MCP screenshots). If any phase fails, an autofix subagent patches the code and QA re-runs (up to 3 attempts per step).

Architecture

Every game follows the same architecture, whether 2D or 3D:

src/
├── core/
│   ├── EventBus.js       # Singleton pub/sub — all cross-module communication
│   ├── GameState.js      # Centralized state with reset() for clean restarts
│   ├── Constants.js      # Every magic number, color, timing, speed
│   └── GameConfig.js     # Engine config (Phaser or Three.js)
├── scenes/               # Scene lifecycle (Phaser) or states (Three.js)
├── entities/             # Game objects (player, enemies, obstacles)
├── systems/              # Background, particles, spawners
├── sprites/              # Pixel art data (palette, matrices, tiles)
├── audio/                # Strudel.cc procedural audio
│   ├── AudioManager.js   # Init, play, stop wrapper
│   ├── AudioBridge.js    # Wires EventBus → AudioManager
│   ├── music.js          # Background music patterns
│   └── sfx.js            # Sound effect patterns
├── playfun.js            # Play.fun SDK integration
└── main.js               # Entry point + render_game_to_text() + advanceTime()

EventBus — Modules never import each other. All communication via pub/sub with domain:action event names.

GameState — Single source of truth. reset() gives a clean slate for restarts.

Constants — Zero hardcoded values in game logic. Sizes are proportional (GAME.WIDTH * ratio), with DPR-aware scaling for retina displays.

render_game_to_text() — Every game exposes window.render_game_to_text() returning a JSON string of current game state, so AI agents can read the game without interpreting pixels.

Skills

Reference Skills (loaded automatically by Claude when relevant)

Skill	Purpose
phaser	2D game patterns — Phaser 3 scenes, arcade physics, high-DPI rendering
threejs-game	3D game patterns — Three.js event-driven architecture, modular systems
game-assets	Pixel art sprites — renderPixelArt(), renderSpriteSheet(), palette system
game-designer	Visual polish — gradients, particles, screen shake, transitions, juice
game-audio	Procedural audio — Strudel.cc BGM patterns + Web Audio SFX
game-qa	Playwright testing — gameplay, visual regression, performance, accessibility
game-architecture	Reference architecture patterns for event-driven games
game-deploy	Deployment — here.now (default), GitHub Pages, Vercel, Netlify, itch.io
playdotfun	Play.fun (OpenGameProtocol) — SDK, API, auth, leaderboards
fetch-tweet	Fetch tweet content for tweet-to-game conversion

Slash Commands (user-invocable)

Command	Description
/make-game [2d|3d] [name]	Full pipeline: scaffold, pixel art, design, audio, deploy, monetize
/improve-game [focus]	Deep audit + implement highest-impact improvements
/design-game [path]	Audit and improve visual polish
/add-feature [description]	Add a gameplay feature following architecture patterns
/add-assets [path]	Replace geometric shapes with pixel art sprites
/add-audio [path]	Add Strudel.cc music and sound effects
/monetize-game [path]	Register on Play.fun, add SDK, get monetized URL
/qa-game [path]	Add Playwright QA tests
/review-game [path]	Code review for architecture + best practices

All commands are prefixed with game-creator: when installed as a plugin (e.g., /game-creator:make-game).

Agents

Agent	Description	Preloaded Skills
game-creator	Autonomous end-to-end pipeline with build/visual gates (no user confirmation between steps)	— (delegates to subagents)
game-reviewer	Reviews codebases for architecture compliance, performance, and monetization readiness	game-architecture
game-qa-runner	Runs Playwright test suites, diagnoses failures, fixes code, and re-runs until green	game-qa, game-architecture
game-deploy	Deploys games to here.now (default), GitHub Pages, Vercel, or itch.io with pre/post validation	game-deploy

Examples

8 complete example games in examples/, demonstrating both engines:

Game	Engine	Description
flappy-bird	Phaser 3	Classic flappy clone — 5 scenes, 15 Playwright tests, full audio
barn-defense	Phaser 3	Tower defense game
vampire-survivors	Phaser 3	Survivors-like auto-attacking game
example-game	Phaser 3	Asteroid dodger (generated by /make-game test run)
flappy-bird-3d	Three.js	3D flappy bird variant
flight-simulator	Three.js	Flight sim with terrain
labyrinth	Three.js	3D maze game
singularity-run	Three.js	Endless runner with matrix rain effects

cd examples/flappy-bird
npm install
npm run dev        # http://localhost:3000
npm run test       # Playwright tests
npm run build      # Production build to dist/

Templates

/make-game copies a runnable starter project from templates/ — not generated from scratch. Both templates include all dependencies, the full EventBus/GameState/Constants architecture, QA scripts, and procedural graphics (no asset files).

Template	Engine	Includes
phaser-2d	Phaser 3	Boot/Game/GameOver scenes, Player entity, ScoreSystem, arcade physics, high-DPI support
threejs-3d	Three.js	Game orchestrator, Player mesh, LevelBuilder, HTML overlays, InputSystem (touch + keyboard)

Both templates ship with scripts/verify-runtime.mjs (headless runtime check), scripts/iterate-client.js (action replay + screenshots), scripts/validate-architecture.mjs (pattern validator), and scripts/example-actions.json (default test actions).

Tech Stack

Layer	Technology
2D Engine	Phaser 3 (^3.90.0)
3D Engine	Three.js (^0.183.0)
Audio	Strudel.cc (@strudel/web ^1.3.0) — AGPL-3.0
Build	Vite (^7.3.1)
Testing	Playwright (^1.58.0) + axe-core (^4.11.0)
Monetization	Play.fun (OpenGameProtocol)
Language	JavaScript ES modules

Quality Assurance

QA is built into every code-modifying step of the pipeline via a dedicated QA subagent:

1. Build — npm run build catches compilation errors
2. Runtime — Headless Chromium checks for WebGL errors, uncaught exceptions, console errors
3. Gameplay — Iterate client replays game-specific actions, verifies scoring works and death triggers
4. Architecture — Validates EventBus/GameState/Constants patterns, flags magic numbers
5. Visual — Playwright MCP screenshots check entity visibility, safe zone compliance, button labels

If any phase fails, an autofix subagent patches the code and QA re-runs (up to 3 attempts). Problems are caught when introduced, not at the end of the pipeline.

Play.fun Integration

The /monetize-game command (and Step 5 of /make-game) registers games on Play.fun and integrates the browser SDK:

1. Authenticate via web callback or manual paste
2. Register game with anti-cheat limits based on scoring system
3. Add CDN script + src/playfun.js (wires EventBus to addPoints()/savePoints())
4. Rebuild and redeploy

The SDK is non-blocking — if it fails to load, the game still works. Points buffer locally during gameplay and sync on game over.

License

MIT (games using @strudel/web for audio must use an AGPL-3.0-compatible license)

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