Algodoo

This is a spring-engine car I made. Not too complex or awesome, but its engines are more stable than most (with one exception, which I'll explain in the controls).

Controls:
A/S/D — Back/Brake/Forward. Behaves just like regular motors.
Return — lock/unlock the engines (shouldn't need to use this much).
Shift — Start or un-bezerk the car. The two engines need to turn in opposite directions, and if the car stalls they will get going in the same direction and the car will pick itself up off the ground and start spinning. Stupid inaccurate conservation of angular momentum.

Credit to Bronie12345 (assuming it was his idea first) for the idea of using "glue together" to transmit power. There's no real reason to use it, in this car, but I just saw his scene and decided to do it that way. The car could use a spring transmission or simple "driveshaft" instead, which might make it possible to give it suspension. If my spring engine is, in fact, anything interesting, anyone who wants has permission to build a new car using this spring engine design.