Very unique OST with a lot of great content, pretty impressive !
It really capture that 90s horror point'n click vibe of games like D, Phantamasgoria or Clock Tower with the mood and instruments chosen (and with the great cover also, the logo's texture reminds me of the one from Illbleed too).
I quite enjoyed the story told through the variety and quantity of the tracks, you can easily imagine a bunch of different sceneries in 3D prerendered environments with it, you have done quite a good job on the setpieces !
My favourite of the bunch has to be Passageways, with the voice lines and the bells it feels very haunting and memorable, I liked it a lot !
Maybe with the concept of your game I could have expected the music quality to be a bit more lo-fi (like it was the ripped soundtrack of a game from this period) but having music sound good and not being overly compressed is an understandable motive.
Excellent soundtrack, congrats for your work !