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.
Hints
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.