Unlimited credits
The game increases the number of available credits each time that it is restarted. If played enough times, your available credits will be unlimited.

New shooting weapons
Collect all the objects you see after the planes explode.

Full pause screen
Pause game play, then press X + Y.

In-game reset
Pause game play, then hold A + B + X +Y and press Start.

Expert mode
Successfully complete the game under the arcade or higher difficulty setting to play more difficult levels.

Replay mode
Successfully complete the game to unlock the "Replay" option at the main menu. Select it to watch the game auto-play.