Really awesome game :D the artstyle is a little too simplistic for me and the gravity could use some tweaking. Other then that the game was pretty cool. :D
I'm playing the windows version and I read your comment. Just started the music before the game and it's good to go :P It's really awesome the music is a 5 star from me :D
(Sidenote: i was using Godot aswell and i didn't have any issues with the StreamPlayer... Maybe your music is too loud...?)