So I was randomly looking at this physics site:
http://www.myphysicslab.com/collisionGame.htmlI played this game for a bit when it hit me: This would be really fun in GM10! Players would build a contraption with certain limits (IE, only 1000 force for all thrusters combined, 5 wheels) and would try to knock each other out of the ring... or use destructible parts and destroy each other.

Yet another project to put on the back-burner I guess... with the other dozen projects...