that's odd. It might have to do with your sound mixer, or maybe... um...
I guess i can understand if one fangame's music won't play...
but ALL OF THEM?
that doesn't make any sense. maybe you somehow have mute toggled and the sound on them won't play? Well actually, i have a second thought. Kamilia's music runs through a music folder externally. But most fangames run their music internally. that might be part of the problem. Try playing fangames like I wanna kill the guy or others that run their music externally and see if it works.