Thank you for playing and thank you for the feedback :)
I always design the audio to be annoying, mostly because I am not really good at making beautiful harmonious music but also to add another difficulty to the game: finishing it with the music.
Never encounter THIS specific bug, but it seems to be related to the way the game engine handle click/touch, because I did encounter several bugs related to that area, I'll see if I can fix it !
The game was originally harder but I changed it because I thought most people wouldn't be able to finish it, which is why you can finish the game with just the big cube, I am still happy that I implemented this fix because while most players would figure they can win that way, it still preserves the gameplay creativity (the other fixes I thought of during development would have been too cumbersome or changed the gameplay drastically)