I am a fairly big fan of Feudal Japanese settings, so this immediately caught my attention, especially with the idea of playing as a temple priestess.
In theory, this demo doesn't do much different than many other horror games. You walk, spooky things happen, you trigger events and you find items. And yet, with the setting, just the right sounds and sights at just the right time and an overall oppressive atmospere, I was immediately on edge from the start. As you'll see, even when I absolutely call a certain scare before it happens, it STILL manages to get incredibly uncomfortable, and it has been a while since I have gone so out of my way to not make noise during a monster encounter.
Whatever magic you worked to create that atmosphere, PLEASE do keep doing it. I signed up for the newsletter and I am VERY excited to see how you might interpret other Yokai from Japans rich folklore. This one is a keeper - I'll be there on release.