Codes
Enter these codes at the main menu or in-game to activate their corresponding functions.
| Code | Effect |
| UP UP DOWN DOWN LEFT RIGHT LEFT RIGHT | Infinite Ammo |
| UP DOWN LEFT RIGHT UP DOWN LEFT RIGHT | Unlock All Stages |
Watermark 20 Code
Enter the code when you are on the pause menu screen.
| Code | How to Unlock |
| ZZZCZZCCZ | Toggle "Watermark 20" On/Off |