Great project, and clean code, thanks for this. Also interesting how you encode the soundtrack in js instead of putting it in the assets folder and then proceeding to sample the soundtrack in js yourself!
"let music_data = [6014,21,88,[[[7,0,0,1,255,0,7,0,0,1,255,0,0,100,0,..."
"let music_data = [6014,21,88,[[[7,0,0,1,255,0,7,0,0,1,255,0,0,100,0,..."