Hey!
I've just played through the demo and I want to start of by saying that it's been a really cool experience. You put a lot of cool and in my opinion pretty well animated jumpscares in and the dialogs were of high quality aswell.
Beforehand I just want to say that this is not ment to shine bad light on your game, but to purely give you some honest feedback.
In these comments I see a lot of people that have enjoyed the demo a lot, aswell as praised the well animated/very scary jumpscares, which I agree with, but only in a demo. I don't know what your future ideas are for your game, but having all these jumpscare events is going to get very boring to players very quickly, not because they're bad, but because there's just no room to purposefully enjoy the story that you've made while being under the constant fear of being jumpscared.
The next thing I want to address is the inventory system. While being interesting having a quick-inventory at first, I quickly became annoyed by having to swap back and forth between the two. What I would suggest is simply being able to interact with certain things while you're holding the item in your hand without additionally having to open a quick-inventory to perform the action instead. A quick-inventory could be cool if used for general game mechanics, looking at quick-inventorys of DOOM and Horizon Zero Dawn, where you have to swap between weapons during battle to fuel a variety of different player-styles, however in this case it doesn't add any real functionality, or atleast not in a practical way.
Anyways, I generally think your game has potential, just don't overuse the jumpscares and maybe try to rethink the current inventory system.
Have a good day!