Level Select and More
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.

Level Skip
To skip a level, press A + Start simultaneously.

Slow Motion
For slow motion, pause the game, then press B rapidly