🧠 Mind Gym

Browser-based cognitive training with adaptive difficulty, N-back training, and spaced repetition

English • 简体中文

Zero dependencies • Works offline • Bilingual (EN/ZH)

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🎮 Play Now

🎬 Preview

N New Game · P Pause · H Hint · ↑↓←→ Navigate · Enter Flip

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✨ Features

5 science-backed training modes to improve cognitive function:

Mode	Focus	Description
Classic	Visual memory	Match pairs in 4×4 / 4×5 / 6×6 grids
Countdown	Speed	Race against time limits
Daily Challenge	Consistency	Same layout for all players worldwide
N-back	Working memory	Match stimulus N steps back
Delayed Recall	Long-term memory	Post-game recognition test

Adaptive Intelligence: ELO-like rating (600-1600) auto-adjusts difficulty based on your performance.

Fully Featured: 🌍 i18n (auto-detected) • 📲 PWA installable • ⌨️ Keyboard navigation • 💾 Export/JSON backup • 🏆 Achievements

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🚀 Install as PWA

Desktop (Chrome/Edge): Visit site → Click ➕ install icon → Launch from desktop

iOS Safari: Share → "Add to Home Screen"

Android Chrome: Menu → "Add to Home screen"

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🛠 Development

git clone https://github.com/LessUp/mind-gym.git
cd mind-gym && npm install
npm test           # Run unit tests
npm run build:css  # Compile Tailwind

Stack: Vanilla JS (ES2022) • Tailwind CSS 3.4 • Jest 30 • GitHub Pages

• ⚡ <100KB total (no runtime dependencies)
• 🎯 Lighthouse 95+

Project Structure

├── index.html    # SPA entry
├── app.js        # Game orchestrator
├── sw.js         # Service Worker
├── src/          # Core modules
│   ├── storage.js, stats.js, modes.js, i18n.js, fsrs.js
├── __tests__/    # Jest tests
├── docs/         # User guides
└── openspec/     # Spec-driven development
    └── specs/    # Capability specifications

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📖 Documentation

• Documentation — User guides and tutorials

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🤝 Contributing

See CONTRIBUTING.md. Steps: Fork → Review specs → Code → Test (npm test) → PR

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📜 License

MIT License © LessUp

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Made with ❤️ for cognitive health