Algodoo

A gearbox controlled with keypresses through key bindings.

Right arrow key to accelerate

Down arrow key to brake

Press 1 to engage 1st gear (use to start driving)
Press 2 to engage 2nd gear (use at around 6m/s)

Press 3 to engage 3rd gear (use at around 15m/s)

Press R to engage the reverse gear

Press N to disengage all gears (neutral)

I had a shot at Thyme, it seems my actionscript knowledge was really useful.