Thank you for your feedback!
I agree with you, the sound design could be better. There is a total of 5 tracks, and they do change when the player enters a new area, but first of all they are a bit samey, and second of all I failed with technical implementation. I played through the game again just to be sure and at some point you will just hear 1s of a new song and then it goes silent. Big issue and I am quite sad I failed to notice and fix it during the jam.