Done! I've created a fully-featured anime arm wrestling game with all the mechanics you requested:

**Features Implemented:**
- **12 Anime Characters**: Mikasa, Sakura, Erza, Akame, Revy, Yoruichi, Android 18, Maki, Fubuki, Kale, Nami, and Tatsumaki
- **Realistic Mechanics**:
  - Tap LEFT side = Normal push (no stamina cost)
  - Tap RIGHT side = Power push (costs stamina, stronger force)
  - Stamina drains only on power pushes
  - Recovery system that slowly regenerates stamina
  - Fatigue builds up as you fight, reducing effectiveness
  - Arms shake/tremble based on intensity
  - Angle indicator shows match progress (±45° = win/lose)
  
- **Training System**: Improve your character by training:
  - 💪 Strength: Increases push power
  - ⚡ Stamina: Increases max stamina pool
  - 🛡️ Endurance: Reduces fatigue effects
  - 🔄 Recovery: Faster stamina regeneration

- **Opponent AI**: Bots make strategic decisions based on stamina, fatigue, and match position
- **Visual Effects**: Character fatigue shown with red overlay and sweat drops when exhausted
- **Dynamic Difficulty**: Stamina drain scales based on strength difference

Open `index.html` in a browser to play!

**Next Ideas:**
1. **Tournament Mode** - Battle through all 12 characters in sequence with healing between matches and unlock special abilities
2. **Character Customization** - Add equipment system with arm bands, power gloves, and energy drinks that provide stat boosts and special effects

**Ready to level up your game? Pick one and let's build it!**