Slide show
Press [Ctrl] + V at the main menu.
Sound test
Press [Ctrl] + T at the main menu.
Mystery spot
Press [Ctrl] + B during game play.
Level skip
Press [Ctrl] + L during game play. Note: One life will be lost when this code is enabled.
Previous level
Press [Shift] + [Ctrl] + L.
Violence mode
Type blood during game play in v1.1 to enable the violence from v1.0.