I don’t know why, but there actually are official theme songs for this game… and there are three of them! (Wow!)

Unlight by KANADE

Everlasting by KANADE

And here is the one for the Kickstarter project:

Puppets In The Dark by Kaoru Hayano

(OK I know this isn’t what you’re expecting from me… I’ll start writing what you want to know soooooooon)    _(:з」∠)_