Very creative and I don't think it's that short. I agree some of the instructions could have been more clear(like train one). Music got annoying at times though.
4/5
Very nice game 5/5 :D
Tip for 6000 ft:
The following strategy from a previous post definitely works: "Accelerate to 200mph. then wait for you speed to go down to 75 and accelerate again to 200. Make sure your resistance is 3% Repeat till you run out of boost and you should get it."