It's weird but I do not hear any music.
EDIT: when using safari.
it's working with the desktop app, thank you! and yes, I do have this problem with every Bitsy game, I just thought they don't include music..
I know Google Chrome recently made a change that prevented audio from autoplaying on load, and it stopped a lot of Bitsy/web game music from working. Maybe Safari has done something similar. I'm glad you were able to get it working :)