Run the game with "aquabug" switch to enable debug 
 options (i.e. vrvoodoo.exe aquabug).
 
 Now you have the following cheat keys:
 
 S             - Toggle Text Shadows
 P / L         - Increase / Decrease Text Shadow Grey
 O / K         - Increase / Decrease Text Shadow Alpha
 I / J         - Increase / Decrease Bitmap Shadow Gradient
 U / H         - Increase / Decrease Bitmap Shadow Offset
 Y / G         - Increase / Decrease Bitmap Shadow Alpha
 C             - Toggle Level Cheat Mode
 Ins / Del     - Change Current Class
 Home / End    - Change Current Level (only for Class 4)
 PgUp / PgDown - Change Current Stage
 F8            - Toggle Narrow Stage