Start the game with the aquabug command line parameter. Then, press one of the following keys to activate the corresponding cheat function.
Effect Key
Toggle text shadows S
Increase or decrease text shadow gray P or L
Increase or decrease text shadow alpha O or K
Increase or decrease bitmap shadow gradient I or J
Increase or decrease bitmap shadow offset U or H
Increase or decrease bitmap shadow alpha Y or G
Toggle level cheat mode C
Change current class [Insert] or [Delete]
Change current level (only for Class 4) [Home] or [End]
Change current stage [Page Up] or [Page Down]
Toggle narrow stage [F8]
Toggle debug options D