There was no music but the game was a great example of a progression game. I did find the fact that the main gimmick of the game was just swiping your mouse to be a little unfun. Eventually no matter who you are will beat this game. I personally like at least some strategy to be involved in the main loop. Otherwise the Game is well polished and i didn't encounter any bugs that i could tell of.
We are told by you that you sneak into the backyard of a property but we don't see that in game. A quick cutscene for the introduction rather than just going into the backyard, and Perhaps A gimmick where you have to hid the mouse if the person who lives in the house looks out may be good?
EDIT. I refreshed the page after seeing the dev's reply. Music did in fact actually load. I only played once the first time because I wanted to review alot of games. The music is pretty good, Kinda spacy.