I seem to have encountered a similar problem. Uxn11 (60b2607b) built OK (no errors) on Debian 12, and Oquonie runs, but with no sound. Tried on Debian 11 and Ubuntu 20.04 and same thing. Played around with pulse audio and pipewire to see if that would solve the problem, but not much luck, unfortunately. Also tried running the Windows executable under Wine, and that worked a bit better, but ultimately the sound cut out early on in the game, pretty much replicating what Twilight Sparkle reported.
What version of linux is the game being tested on?