At the end of the first Board James level, Hippo Hell, when you're riding the helicopter, if you go to the top of the ladder on it once the level exit TNT thingy is in sight, then jump off to the right just as the helicopter stops moving, you will land on the platform above the level exit and get the power glove. Then, simply break the blocks to your right with the newly acquired powerup, and exit the level to save it.
The Cape
In the first stage of Ghouls n' Garbage, immediately after exiting the water for the last time, climb the wall on the left until you see some breakable blocks. If you have the power glove, break the blocks and get the cape. It's a pretty useless powerup, but it looks cool.
Turbo Controller
In the first level of Browntown, Dookie Dookie Panic, immediately as the level begins, there should be a wall at the bottom of the screen that is brown and has cracks in it. If you have the power glove, break the wall, and continue through the opening that you've created. In the middle of the room that you enter through the broken wall is a controller sitting between a bunch of traps and enemies. Neutralize the enemies, avoid the traps, and the turbo shot is yours. Note: It allows you to charge your gun, not shoot rapid fire.