Algodoo

a rocket powered car
press L (this will open the lid)
load the rocket engines into the car
press L again (this will close the lid)

if you just want to drive press the arrow keys and press B to brake
if you want to drive really fast press and hold enter for 2 seconds this will 'ignite' 1 rocket engine (there are 6 total)
depending on how fast you are going you can hold M+B (Massive Brake) until you stop or you can hold S+M+B ( Super Massive Brake) until you stop


have phun