This game is disorienting but fun. I got gold medals (or on one a secret Supersonic medal) on everything but 6 up through level 8, though it was hard to figure out where to go at times. Tracks 9 and 10 appeared to be duplicate courses. Main Menu had level 8 and level 7 medals swapped. When I got the midair trick upgrade it became basically unplayable with WASD suddenly rotating the car midair, which happens all the time. Otherwise, audio and graphics were solid.

Playability:
Fun racing time-attack game. Really plays well even if the car feels a bit floaty at times. Nice work.

Theme:
Didn't feel the theme on this much as there is no real tie-in to gameplay here. 

Cleverness: 
Cool to see a racing game and especially a speed running precision one. This is kind of a rarer genre with only a few games I can think of serving that audience. Nice job with implementation of fail-fast methodology here as well.

Artistic Style: 
Consistent and simple 3d models. Everything is very readable and looks clean.

Really fun game! Controls really well and the presentation fits awesomely, sometimes it was a little unclear where to go next (like, noticing it in an instant), but that's part of learning a track.
On level 3, there is a button under the timer on the right side that when I click it, it kind of destroyed the game. (timer stops, going over the finish doesnt count, when resetting the countdown timer is stuck at 3, so needed to do a hard reset)
Very cool!

Yo that was fun!

The Records panel on the left was clipped out of my screen, in both windowed and fullscreen mode, so I couldn't quite tell what that was for. But generally the music was solid, the controls felt smooth, the camera angles felt great, it was a very slick experience! Loved the main menu.