Algodoo

It has spring engine of my idea, which works better then standard
oscillation (damping) engine. It has 2 gears and 1 null gear and engine
power output (throttle) is controled by up and down arrow which changes
spring power by 50 N/m every click up to 1500 N/m.
Controls:
Gears:
Gear 1 - click 1
Gear 2 - click 2
Null gear - click q
Power:
Power up - up arrow
Power down - down arrow
Engine controls:
I - changes engine power to 500 N/m for initial ignition
S - gives engine initial spin up to 1200rpm]

Every part of the vechicle is free to use. I'll apriciate every discusion about this
project and suggestions. Enjoy!