The Game Genie code PENNOYAA re-enables debugging options that were cut out of the final game:
- Any level can be selected without the level select trick.
- Death/Non Death toggles invulnerability.
- Weapon Select (Choose between 1-5)
- Bomb Select (Choose between F, T, B, and W)
Additionally, hold Up + Start on the "Nexoft" screen before it fades out to view the ending.