The ambient bubbles are now working. The game maintains 50 floating bubbles that rise naturally through the water and respawn at the bottom when they reach the top, creating a peaceful underwater atmosphere.

**Next Ideas:**
1. **Parallax Background Layers** - Add multiple coral/seaweed layers at different depths that move at different speeds for depth perception
2. **Day/Night Cycle** - Gradually shift lighting and colors over time, affecting visibility and predator behavior

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