Super Gravity Balls

Hold C+R+X at the menu for a secret game

Hit F5-F8 while playing for extra cheats
F5: Ends current wave of balls. The next 
    wave counts towards the next levelup 
    so abusing this cheat is unwise.
F6: Refill zaps
F7: Level up
F8: Add power-up 

Submitted by: Conner54