Hello, resident music guy here.
First, thanks for playing!
Second, the no music bug is very strange, I downloaded the game a few times just now to test and music is working in all of them. Would you download it again to see if the issue persists for you? If you don't want to no worries. There was originally a webGL build which had the no music bug, but that was scrapped and replaced with a zip file in which the issue should have been resolved.
Thank you for your feedback!