Extra Options
Pause the game and press Up, Up, Up, Down, Down, Down, Left, Left, Left, Right, Right, Right, C, C, B, A. This only works once per game.
Extra Ships
Pause, then press Right, Down, Right, Down, Left, Up, Left, Up, B, C, A. This only works once per game.
Level Select
To start at any round hit Reset ten times, then hold Down-Left and go to the Option mode and you will get a Level Select option.
Full Power
For maximum cannon power, pause the game and press B, B, C, B, B, C, Up, Down, A. This only works once per game.
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