Cheat mode:
Enter 0601 and ignore the invalid password message. Press Start to return to the command center. Begin game play and hold Select +Up to move up vertically. Press Left or Right to move in that direction, or Select + Down to move down vertically. Hold Select + A to obtain the Noisy Cricket super-gun. A lightning bolt will appear next to the number of lives remaining to confirm correct code entry.

Level skip:
Enter 2409 as a password and begin a new game. Pause game play and press Select to advance to the next level. Pause game play and press A to advance to the next stage within the current level.

View ending sequence:
Enter 1943 as a password.

Hint: Bazooka:
Begin game play, then before a shot, pause, resume, pause, resume, then hold Jump down for approximately one minute before shooting. If done correctly, the shot will be more like a missile.