Algodoo

This scene took me a long time to make and I would appreciate it if you rate it.

The 'colorfulness" was kind of by accident, I used a different color for every gear type.
10th - red
9th - yellow
8th - purple
7th - lime
6th - cyan
5th - pink
4th - orange
3rth - black
2nd - gray
1st - white

10th being the fastest and weakest and 1st being the strongest and slowest.

To change gears you press up and down arrows. The engine is connected to the red circle and the tires to the blue.

If you want to use this as a phunlet the variables are:
scene.my.coll1 = 0;
scene.my.coll2 = 0;
scene.my.coll3 = 0;
scene.my.coll4 = 0;
scene.my.coll5 = 0;
scene.my.coll6 = 0;
scene.my.coll7 = 0;
scene.my.coll8 = 0;
scene.my.coll9 = 0;
scene.my.coll10 = 0;
scene.my.gear = 0;

Credit me if you use it in a scene.

Forum topic: http://www.phunland.com/forum/viewtopic.php?pid=96035#p96035