Hey, nice submission!
I actually really like the transitions and the overall sound of it, good job :D

I would love for you to share .mp3's too, if that isn't too much effort. The reason is that I save all kinds of submissions from these jams in one big iTunes folder. (Yes, your 'Grasslands' from the Town Music Jam #2 and 'a slime and a star' from the OST Composing Jam are also in there!) Otherwise, I would have to manually download them from YouTube and... that is such a hassle. If you don't want to, I understand, no worries :)

I like the first and last lap. I think the last seconds that represent the finish are great.

I have the feeling of a race when listening to your music. The engine sounds are a real plus for the atmosphere.

Great job!