Level select
Enter "ZZZCYX" as a password. A new "Level Select" option will appear at the top of the options menu.
Invincibility
Enter "XBABYX" as a password. The word "Correct" will confirm correct password entry. You will lose energy, but no lives, during game play.
Bonus mission
Move south after completing the objectives in mission 1, phase 2. Enter the alternate exit in the dead end canyon to start a bonus underwater mission.
| Level-Phase | Password |
| 2-2 | CBYXYC |
| 3-1 | XABXAB |
| 3-2 | AZCBXC |
| 4-1 | YYBBCY |
| 4-2 | BAXCXX |