Comment 14 for bug 250334

Thanks for your effort with testing, the pygame.error problem is still there. It looks like fretsonfire crashes when it cannot detect an audio device. It should instead load the game and display a helpful message. I have marked this bug as triaged.

Does sound work in the rest of your system? Please test with System -> Preferences -> Sound, in particular, the ALSA and Pulseaudio settings. You may want to try starting fretsonfire with ALSA and Pulseaudio to see if it works with one but not the other.