I'm glad you've found my feedback inspiring! It was my pleasure.
As for the audio, have you been following the Bitsy Muse instructions and added all of the soundtracks into the folder? Also, there's an 'add bitsy audio' tool, don't know if you've used it. I didn't work for me, but maybe you'll have better luck. Unfortunately, Bitsy Muse have not been supported for some time now, as far as I understand, hence the compatibility problems with newer versions of Bitsy.