A very simple core gameplay loop, but it works well :) The easiest ideas are often also the easiest to screw up, but I feel you dodged that bullet. The speed, the snappy controls, the spacing of checkpoints, it’s all nicely balanced.
As others stated, with more polish and content, it could turn into something great. And the soundtrack does make it feel almost like a rhythm game.
Also, congratulations on your first jam entry!