The lore is so rich xD (seriously I like it !)
And the movement is tricky, but that makes it so interesting !
the music is maaaybe a tad harsh but it fits completely the ambiance and you get quickly used to it
I think the music is great ! it is just the way it is played
I think it can be fixed by making it more subtle in the background, and as a suggestion you can maybe (for the v2) add sound settings x)
Either that or maybe use a softer music for the start which goes full action packed 8 bit style a bit later (as I said, once you are playing, you get used to it, it is mosttly a rough start x)