Invincibility:
Enter BUBBLE at the cheat screen.

Unlock All Levels:
Enter DINGO at the cheat screen.

Unlimited ammo:
Enter BISCUIT at the cheat screen.

All FMV:
Enter FLICKY at the cheat screen.

All multi-player characters:
Enter PEEPS at the cheat screen.

Start with lightsaber:
Enter FUDGE at the cheat screen.