To Do:
1. Make tutorial clearer.
2. Slightly decrease difficulty of 1st level.
3. Nerf damage from 2nd level boss.
4. Make it clear how many bombs people have.
5. Make selection screen more intuitive.
6. Add restart level button on pause screen.
7. Add 3rd level.
8. Add 4th level.
9. Add practice modes (unlocked after beating every three levels).