First of all - the music was nice and upbeat. It feels like you have full control over the cart, which is normally a good thing, but with this type of game, I think it would be super fun/chaotic if you slipped and slid it all over the place.
One thing I really appreciated is that it you had a webGL build. Thanks!
Overall the game was great for about the first 2 rounds, then it got stale. Never the less, for a jam, you did a great job. Congrats! :)