Hm... there seems to be a problem with the audio. Music seems to disable itself when entering into any of the levels for me after I turn it on? Audio for anything else (if there is any) is also no there. Audio does work for the menu though...
I tinkered with the music saving system and updated the game. though i don't know anything about audio problems, works fine for me and i haven't heard complaints from play testers about that one.