The music should be looping, thanks for reporting this. I will look into it.
Does it stop after one track or after a few tracks?
Sorry I didn't write more when I was online, I got off pretty shortly after that, I think.
Ran a couple quick tests and found a couple things just now:
1. Tabbing out of the game while the music's running will have the song finish, but not start the next one until I get back to the tab. (It's probably some powersaving thing in the browser, IDK.)
2. It stops for good after 3 (four?) songs even when I'm actively on the game's tab. However many songs there are, I mean, it didn't repeat any. Ticking and unticking the music toggle only toggles the wave audio, the music doesn't come back.
Thank you for taking the time to test this out. Really appreciate it. State one (1) is expected with how the browser interacts with the backend threads that play the music. State two (2) is a bug. There are 7 total tracks that get randomized, then played. It should loop once done so they keep going. If only 3-4 are playing and there is no looping, then we have a double bug!