All right, I've installed Devuan ASCII in virtualbox and wasn't able to reproduce the bug you're experiencing :(
Are you 100% sure that sound files (like e.g. "music.mp3") are unpacked and available under relative path "assets/sounds/" to the game binary? And that you have SDL2_mixer installed from repository (i.e. not from some local sudo make install)?
Okay, I've managed to find it, it was totally my bad. I've used some 24-bit wav sounds, but it happens that SDL_mixer plays those on some systems and does not on other.
Here's the updated archive for you: https://www.dropbox.com/s/phmsd9mv51t1hk2/darkness-looming.tar.gz?dl=1
Oh, and if there'll be no sound, please try running it with the environment variable SDL_AUDIODRIVER=alsa.
Sorry for all the fuss :)
