Aw. thank you so much! I'm glad you like both versions. We did have a musician create the tracks specifically for this game and plan to make the soundtrack available eventually. It'll be some time after October, though. Right now there's a way to get the XOD soundtrack for free. It doesn't have the extra spooky tracks, but does have additional seasonal tracks that aren't in XOBD.
https://gb-patch.tumblr.com/post/185278893701/hello-to-celebrate-gb-patchs-upcoming