I wish I had made the music myself, hahaha! No, it's "Rondo alla turca", from Mozart. This version, specifically:
The window thing kind of surprises me, what resolution was your monitor on? It shouldn't matter but who knows. I did develop it with mobile in mind but plays just fine in my desktop, hm.Yeah, that bug of the furniture piling up has been pointed out by others, and it's probably gonna chase me in my nightmares. I should've really just set the spawn point of the furniture to alternating between two different points to prevent this, buuuuuuut yeah, guess who didn't because they didn't find out about this up until it was already submitted ^^
Yeah, you can totally walk in the air sometimes haha. I believe it has something to do with weird collision detection by the raycasts the character uses.
Thank you so much for your extensive feedback :)