Thanks for checking out the game :) - and thanks for the feedback!
Volume controls and maybe a fade-in and -out effect for the music I sadly didn't manage to get done in time. The boom box can be destroyed with the golden fidget spinner item which is in a chest in the basement, the key for which is dropped by the enemy in the spire on the top right of the map. We had a lot of ideas for fun progressions but only managed to throw this together. So you at least have a little more to do than just destroying the boom box right away :)