Not too bad a level. Kept me entertained.

However, I have a couple major suggestions:
1. Add more checkpoits and colldown refreshers. A lot of the time I couldn't boost, and worse than that I felt cheated when I died and was put back really far. I almost rage-quit.
2. Adjust the angle/shape of the track. I suggest just driving over it yourself. A lot of sections I would simply go flying off of the track simply because of my speed, and in other sections it just felt too rough and uneven to drive over.