Algodoo

Goddamn that's a hard contest you've got there. Took me three designs and many hours to get a working version.

Machine is always in gear. Press W to switch (toggle) between high and low. Low is good most of the time; high is good for flat areas. Make sure to take the giant bump/jump things in low, because too much hangtime lets it flip.

The mud balls are evil and suck. You'll just have to get over them the slow way.

The loop is meant for 20 m/s, but this car can scrape over it at 17 m/s. Not sure exactly why it refuses to go more than 17.