youre right a music track would have made the experience more enjoyable, i like your suggestion of making the music dynamic which shifts and adds more notes/ elements to it as the blocks get placed correctly! thank you very much for your feedback and kind words!
and about the undo thing... every single comment is about it lmao so i guess i really should have added that feature somehow!
(i dont know how to implement an undo redo system, ill do some research)