Gauntlet Cheats

In the following levels, you can shoot the walls repeatedly to reveal an exit:
1, 5, 79, 94

When a ghost(s) approaches, shoot a projectile and hold the button in. If you don't let go of the button, the ghost will go right through the character, resulting in no damage.

Right when you get caught on a stun square, pause the game by pressing start, and then unpause it and you will no longer be stuck.