Unlimited continues:
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "vcop2.ini" file in the game directory. Edit the "Continue=" line under the "(GameSetting)" heading to "Continue=10".

Cheat mode:
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "vcop2.ini" file in the game directory. Add the line "Extra=2" under the "(GameSetting)" heading. Start the game and press [F6] to access the "Special" and "Cheat" options.

Last Boss:
Rapidly shoot the small arrow pointing at the first stage at the stage selection screen until the timer reaches zero.

Change characters:
Hold (Reload) for players one and two immediately after selecting the first stage to have Janet as player one and Smarty as player two.
Hold (Reload) for player one immediately after selecting the first stage to have Smarty as player one.
Hold (Reload) for player two immediately after selecting the first stage to have Smarty as player two.