I have a fairly powerful CPU, and it still slows down. Don't say I didn't warn you! This is a large level that I created (actually my first extensive one, most are small ones that practice types of mechanisms), and I made use of "the force", and loads of mechanical switches. I don't like timers at all, so none were used here; I just feel that they take away from the overall feel and realism of an otherwise mechanical game. I don't use rockets much either, but one was appropriate in a part of the level. Enjoy, at least if you like these sort of levels.
Also, what parts of the level do you all like and dislike? I would like to know for future reference, as I haven't made many levels yet, and I would like my future ones to be more fun to watch, or solve if it's not a spectator level. I am experimenting, and trying to come up with new mechanical switch ideas, too.