Algodoo

This is a Go Kart that i maked in 2 days bored, it have time created
aprox 2 weeks.
It is a 1 cylinder spring engine 2 stroke with 1 only gear.

How to use?:
1-press "I" (toggle release engine)
2-press "S" (engine starter. recomended to start at spring contstant 700)
3-slowly put spring contstant to 1000 or more (aprox limit is 7000-6000)
4-press "Up key" (toggle clutch
5- to brake put "down key" (not toggle axle brake)
ALL controls:
I-release engine (toggle)
S-engine starter (not axle; it is a )
Up-Clutch (toggle)
Down-brake

I tested it in a simple mountain terrain and get up the mountain aprox 4000 spring
constant. Max speed is aprox 40km/h