Hi there,
Your game looks absolutely beautiful. Judging by the trailer, it sounds like you might already be working with a composer? If not, then I'll leave my portfolio with you in the chance you might be interested: https://www.hughholbech.com/
I'm currently just looking for a bit of experience, so I've been offering to compose 10 minutes of music for peoples' projects completely for free. Writing music with a dark gothic atmosphere would be so much fun.
Best of luck with your project and I look forward to playing the demo when I get the chance!
Hugh