This looks and feels and plays like a finished game, not something put together in a ten day jam period!
Sadly for me, I'm really only alright at racing games where you never have to break or intentionally slow down, the corners are too tough for me. It took two tries to get to the second track and then another try after that to get to the third. Getting bumped back down to the first track on every loss is a bit too brutal for me or I might have kept going to see the full content of the game.
The other thing I'd like to note is that all the AI cars are basically driving identically to each other, they're always in a pack so that you'll either be coming in first or fifth for every race. It might have been more than could be done in ten days, but giving every AI car a varied (maybe randomized) speed or cornering ability would help to give the player some sense of accomplishment when catching up to and passing an individual racer rather than the entire pack at once.