Nice job! this is a great simulation. Some ideas for the future:
1) decouplers
2) angular friction
3) zoom in - out
4) atmosphere
these tips might be too hard, but I think it would be AWESOME if you manage to do it!
oh and another one: Map screen
I won't be updating it. But the source is available so you, or anyone else, can add features yourself.
Thank you for informing me about this
