A bit unfair to comment on the lack of nitronic track pieces since they wern't in the game at the time this was made.

I can see a few problems, the lack of capped track pieces and somewhat haphazard obstacle placement at times, one of the teleporters doesn't seem to work and I'm fairly sure there should be an extra cooldown ring in one area. The decoration is also a little uninspired but I can;t really complain given how few items were probably in the game at the time this was made.

Overall though I wouldn't change anything though. Why? Because this level is a part of history now, its a snapshot into the early days of distance and what it was like, and honestly, its still pretty fun to play.

If you're trying to make a map similar to Nitronic Rush, I'd recommend using the, uh, I'd call them legacy models but they're probably not called that. Basically, Distance has the models for the Nitronic Rush checkpoints and stuff. I'm sure if you dug around a bit in the editor you'd find them, I've seen them used on other maps (even official maps) and I won't lie that I was a bit disappointed not to see them in this map.

Decent track, you should realy consider closing your track pieces, looks alot better that way :)
Also the "going the wrong way" bug is cause certain track pieces are facing the wrong direction.
So if you flip those the pieces that have it, you wont get that bug anymore, though its just a minor thing and is barly noticable.