Done! Fish World is now 3D with:
- 3D fish models for player, prey, and predators
- Full underwater environment with coral, rocks, seaweed, and rising bubbles
- Movement in all 3 axes (WASD for horizontal, Space/Q to swim forward, Shift/E to swim back)
- Same gameplay - eat smaller fish, avoid larger predators, collect shield powerups
- Third-person camera that follows your fish
- Atmospheric underwater fog and lighting

**Controls:**
- **WASD/Arrows**: Move horizontally (left/right, up/down in water)
- **Space/Q**: Swim forward (into screen)
- **Shift/E**: Swim backward
- **Mobile**: Joystick for XY movement, Jump button for forward, Action for backward

**Next Ideas:**
1. **Underwater Sound Effects** - Add ambient ocean sounds, bubble noises, and eating/being eaten sound effects
2. **Special Abilities** - Add speed boost power-ups or temporary invincibility that creates a glowing aura around your fish

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