Options screen
Press Select at the title screen.
Level select
Enable the "Options screen" code. Hold II + Select and press Run at the options screen. Use I and II to change the brightness of the screen.
Level preview
Enable the "Options screen" code. Hold Select and press Run at the options screen. Use Up and Down to preview the levels.
Sound test
Enable the "Level select" code. Hold II + Select and press Run at the level selection screen.
Extra credits
Hold Select and press Up at the continue screen for an extra continue. Alternately, press Select on controller five for up to nine continues.
Pause game
Hold Run on controller five to pause the game.
Unlimited credits
Press Up + Select + I + II during game play to increase your credits to nine.
Sount test (alternate)
Enable the "Level preview" code. Hold I and press Run at the level preview screen.
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