During  the  game,  press  ESC  to bring up the pop-up menu. Type
glazed  donut  to  enable  cheats. Now you can use the following cheat
keys:

F3                      Go back one level
F4                      Advance one level
AltF12                  Gain five lives
Alt 8                   Ten bombs of each type
Alt B                   "Cloak" power up
Alt I                   "Inviso"power up
Alt K                   "Beach Ball" power up
Alt T                   "Morph" power up