If you put the hydraulic motor gears closer together, it may run more efficiently. Search for "gear pumps". I suspect a gear pump can be used as a hydraulic motor. Anyways, it looks very cool and the construction is very creative.
"Self praise is no recommendation." Good idea, but falls too fast, and not too much control. I'll give you 7/10 just because I haven't seen any other paper airplanes.
Nice lenses, but I'm not sure what the point of this scene is. The exiting beam fluctuates because of Algodoo's calculation variation. Changing sim.frequency will change the amount of fluctuation. The laser beam passes thru the center of each lens, so theoretically you should see no effect. If the laser if offset but parallel to the lens axis, then it will show the focusing ability of each lens.
Nice effect. I like the fact that this effect is created by using symetry and only a few parts. I also liked the effects caused by varying the motor speed. I gave this a 10/10, but I think my original comments got deleted.
Works for me in Algodoo and Phun. You need to know the proper sequence to drive the scooter. First you need to start it, then you need to accelerate, engage the clutch, and select the gear to make it move forward. I'm giving it a 10/10 to offset the low ratings.