awesome! would you be able to create something that you can't see, for one of the cars to go on a motor or roller that goes around the track, so it would be like a CPU? I was just wondering, and I edited your track and added walls. I'll upload it right now if you don't mind.
Could you make a disk around a star or what not? That would be cool to see the planets form. I see you can drag the objects (a cluster), but it's very hard to get the velocity tright. I want to see planets form!
Btw, If you make a moon, you can actually see the sysnchronous radii effect.