I'm glad the build works!
I'm sad the sound doesn't :(
The game is just using the regular pygame api for sound so I'm not sure where to start really. It could be the same issue as before, where some older dependency is being used instead of a newer one your system is expecting, or maybe your system wants to use PulseAudio instead of ALSA, or something else entirely. I'm not really sure.
That log line is interesting, but I suspect it's a symptom of some root audio issue rather than the cause. Looks like the audio buffer isn't being passed as much data as it's supposed to be.
If you're really curious you could try downloading some other pygame games and see if the sound works properly on those - I suspect it won't but you never know.
I think the real answer here though is that I shouldn't have assumed that testing on Ubuntu alone would be enough to clear this for a general "Linux" release, so I'm sorry about that. Moving forward I'll probably label these builds as Ubuntu specifically until I have more of my own machines to test on. Sorry for all the trouble.