Thank you for your comment, I appreciate your thoughts :).
Also thank you for playing my game. Yeah, definetely see that the levels are a bit too traditional, and overall design is bit hard (now that I look at it). I feel like I could've done a lot more in that regard, but now only see systems and mechanics which could've made that more feasible in my mind.
On the music, unfortunately no, it wasn't created by me. The music is from https://opengameart.org/content/time-to-puzzle-it-up. Tried to make my own music, but then wasn't able to create a tune I liked (and wasted too much time trying to) :'(