Algodoo

A car with tracks, but it different from almost any track car anywhere. Most of the time with a track car, it's just two wheels, a track and a thing to hold the wheels together. This track car has two different polygons which keep the track from being sent out due to cintrifugal force and from falling inbetween the wheels due to un-tightness

It controls with the arrow keys, and the scene needs to run at 500Hz -_-.
I know, it's just a car! "Why would you need higher simulation accuracy?", you might be thinking. Well if the sim.frequency is not 500, the chain will become stretched VERY easily, and eventually will be ruined.

Please rate and comment, and P.S., the appearance menu on the right is for the invisible chain withholders (and fixations).