This rocket uses Box2D for its physics. You can steer with the (left-right) arrow keys, but the controls are a little mushy. I'd tighten them up if I were putting this into a real game, but I like them how they are for this demo. I spent way too much time last night doing figure-eights around those boxes. :)
I like it! Unfortunately the performance isn't quite where I need it to be for the rocket game. Also, I haven't managed to get it working in Firefox. I have all kinds of ideas for taking advantage of it, though. I want bad guys to shoot bullets at the rocket that knock it off course and send it spinning. I want the rocket to blast through walls with bricks flying everywhere. I want awesome explosions!