For a first game jam game definitely very well executed. The colors a gorgeous! Looks very nice. Also I like the score screen at the end (and the UI in general).
The player controls feel a little weird (not very smooth) and the player character should definitely be on the left side of the screen, so you can see more on the right! The amount of speed you get from a speed booster is a little insane. :D
Well done. Good result for 3 days.