**Enhancement Ideas for Spherical Snake:**

**Visual & Effects:**
1. **Particle trails** - Add glowing particle effects that follow the snake's movement
2. **Color themes** - Multiple sphere skins (neon, galaxy, matrix, lava) that change the sphere and snake colors
3. **Dynamic lighting** - Make the snake emit light that illuminates the sphere surface
4. **Snake gradient** - Gradient color across snake body segments (head to tail)
5. **Explosion effects** - Particle burst when eating food or hitting yourself

**Gameplay Mechanics:**
6. **Power-ups** - Speed boost, invincibility, magnet to attract food, slow-motion
7. **Obstacles** - Red spheres that rotate around the planet to avoid
8. **Multiple foods** - Different colored food with different point values
9. **Speed increase** - Game gets progressively faster as score increases
10. **Combo system** - Bonus points for eating food quickly in succession

**Game Modes:**
11. **Time trial mode** - Race against the clock to reach a target score
12. **Survival mode** - Obstacles spawn over time, see how long you last
13. **Zen mode** - No death, relaxing endless snake with calming colors
14. **Challenge levels** - Pre-placed obstacles and goals

**Polish & Features:**
15. **High score system** - Save best score to localStorage with a leaderboard
16. **Sound effects** - Eating, movement, game over, background music
17. **Difficulty levels** - Easy/Medium/Hard with different speeds and snake starting lengths
18. **Camera controls** - Mouse drag to rotate view around the sphere
19. **Pause menu** - Spacebar to pause with settings (sound, difficulty)
20. **Tutorial overlay** - First-time instructions that fade out

**Advanced:**
21. **Multiplayer** - Two snakes on same sphere competing for food
22. **Planet customization** - Upload custom textures for the sphere
23. **Special snake abilities** - Phase through yourself once per game, teleport, etc.