Enter all cheats as codes at the cheat screen.

Unlock single player levels 1 to 7:
CHERRY

Unlimited ammunition:
BISCUIT

Invincibility (You can only die, if you jump off the edge of a cliff):
BUBBLE

All multi-player characters:
PEEPS

Start with lightsaber:
FUDGE

Bonus level:
DEMO

All FMV sequences:
FLICKY