Get the Force on your side with these new options. Hold A as you turn on the Genesis, then release the button when the title screen appears. Next, press Up, Down, Left, Right, A, B, A, C, B. Finally enter Config and you'll have a few new features. "Muteki" is your ticket to invulnerability, and "Window" adjusts the game's screen to a new shape.

To skip a level, press A + Start simultaneously.

For slow motion, pause the game, then press B rapidly.