Enter RAINBOW ARTS as your name to enable cheat mode. Now press the following keys to activate the corresponding cheat function.

Code - Effect

[F7] - Get 1 extra bomb
[F8] - Get 1 extra parachute
[F3] - Get 1 extra pickaxe
[F4] - Get 1 extra turbo
[F9] - Get an increase in map depth
[F6] - Get armor
[F5] - Get spikes
[F10] - Skip to the next level