Thank you for playing the game! :)
Unfortunately there is no sound at all, but when you submit the game there are only two options: either "We created the vast majority of the music during the game jam" or "We used pre-existing audio". Neither of those are fitting my case, which is "No audio at all", so I just left it at the first option. But now that I look at it, the second option is probably more correct, even though it's just silence. Sorry for the confusion.