99 lives
Press [F1] during game to display the in-game menu. Then press [Ctrl] + A + L. Type “325″ at the prompt.

View ending sequence
Press [F1] during game to display the in-game menu. Then press [Ctrl] + A + L. Type “589″ at the prompt.

Double item value
Press [F1] during game to display the in-game menu. Then press [Ctrl] + A + L. Type “822″ at the prompt.

Select level
Press [F1] during game to display the in-game menu. Then press [Ctrl] + A + L. Type “7#” at the prompt, where # is the level you wish to warp to.

Invincibility
Press [F1] during game to display the in-game menu. Then press [Ctrl] + A + L. Type “642″ at the prompt. (Note: To disable, type “643″.)