Algodoo

simple rocket motor with forever fuel.
some instructions:
-you can change forward button from the small hinge in the small circle inside the rocket motor, if it shakes decrease the hinge speed.

-you can scale it, BUT you must change the "radius := X" value so the spwaned balls fit to the rocket motor tube.

-dont crash it hard while its on or it maybe stops working until you smash it again or stop it for a sec.