This is really nice, it's the best sandbox physics flash game i've seen. I bet this would do good on Kongregate. You should look into uploading it there, they give money back to the developers. Anyway I think this is a great game and that the menu is nicely put together. I'd love to see more things over time. Good job.
I just put thousands of tiny magnets in it until they were flying around like crazy. Then I dropped ragdolls in and watched them get ripped apart, compleate with my own sound effects. Then I tried to build a fort for defense against the magnets out of ground and static balls, but it hasn't worked yet. I've been doing this for about four hours.