Woo! Fullspeed!
This is my most complicated and "advanced" track I've ever done in any Trackmania.
Really simple, at the beginning just jump where one of the inner arrows points, drive through darkness and do some loops.
After you're halfway through the second loop, you have to either go the the right or left, there are even signs, so you can get back to the normal ground. The finish is a bit crappy, but I didn't really know anything better, maybe driving backwards after hitting the wall might help, well as long as you didn't already fly off the track.
I hope you enjoy