Cheat menu:
Quickly press [C, B, A, Start] four times at the Sega logo to display the cheat menu. The message ""Hi David! Access granted" will appear to confirm correct code entry.

Level skip:
Pause game play and press B, C, B, A, B(2), C, B, A, B. The word "cheater" will be spoken to confirm correct code entry.

Extra lives:
Pause game play and press A(3), B(3), C(4), B, A. The word "cheater" will be spoken to confirm correct code entry.