Yoda's Power Mode:
Go to Game Options and hold down the shift, control, option and command keys. Triple-click on the space between the Rapid Fire and Shut Down Other Applications check boxes. You'll see a Yoda's Power Mode check box. Check it! Now skip to any level by pressing 1 through 9 for those chapters and A through F for the rest. Pressing '+' decreases damage and pressing '-' increases your damage Escape skips to the next scene.

To pass the Hoth cave maze:
Go left, left, right, left, left.