This game is a real good tas candidate with its very high speed and slippery physics.
I have a WIP up to track 3 on challenge 1:
http://tasvideos.org/userfiles/info/70071203169436539
The game is very difficult to optimize, especially when trying to maintain the highest speed. The WIP is just a test speedrun, not a fully optimized run to be submitted.
The nice thing about the tracks is the booster pad act as guides as to where you should be to maintain optimal speed. The powerups serve as distractions which could mess you in up in certain situations. Electrovolt is instant death and very precise. The collision in this game is very iffy. Sometimes you just go straight through a boost pad..
Using rewind is recommended. Would be nice if I could make a save state every frame, but then the game would run extremely slow on my computer.,