Once you get a powerup it's gone forever so don't be greedy...
...at least that was the idea. Apparently it's not working outside of the Unity IDE. It'll be cooler when I fix that, I spose.
I was also planning on putting in all these crazy special items like the eponymous jetpack, various crazy weapons, and a potion that turns you into a lizard. All of which can be gotten exactly once. Could be cool. Guess I'll work on it some more later.
