Cheat mode:

 Press [Esc] during game play to display the options menu, then
 type

 GLAZED DONUT

 to enable cheat mode.

 Then, enter one of the following codes to activate the
 corresponding cheat function. A sound will confirm correct code
 entry.

 [F3]       Return to previous level
 [F4]       Level skip
 [Alt][F12] Five more lives in single player mode
 [Alt][8]   Unlimited bombs in single player mode
 [Alt][K]   Powerup: Beach Ball
 [Alt][I]   Powerup: Invisio
 [Alt][T]   Powerup: Morph
 [Alt][B]   Powerup: Cloak