Great Movie!
One moment, I thought he wouldn't use the switch and you'll let us with a joke-ending. Then he used the switch, and I was disapointed as the square-head scientist, and then I was totally happy :D
Hot Diggedy Demon (or whatever the real name was in the intro page xD), you really have a nice drawing style. I only know your Jerry stuff (by the way, the little allusion to it in the ending scene was cool ;P) and I see your style is really... variated? It's got a lot of variety in it, you got plenty of different characters shape (the head, most of the time) but all fitting your own style.
One think I found a bit sloppy was the blackhole animation: except for the twisted purple thingy where the scientists are swallowed, it's only a bright flashy form, you could have done nice effects with that :P