You've put together some great graphics! Plus a really good and mysterious atmosphere. I know it's not easy even with pre-made assets, so good job on that :D
However, the problem with that is players will hold all aspects of your game to the same standard as the visuals. The reasoning behind it is that the time you've gained using pre-made assets should allow you to excel in the other categories as well. I'm sure this is what Kindman tried to convey in his earlier comment as well.
In my case, the game left me wanting a lot more in the mechanics category. I felt that the monster was really difficult to avoid. Having some specific hiding spots that you can interact with would've been a great addition. The monster aggro didn't play well with the map layout either. If the monster corners you, you're pretty much done for. Switching dimensions and whether you see the monster or not didn't help much with that. I would've preferred if the monster was only active in one dimension, but you're forced to switch to it from time to time for example. Lastly, it was really hard, at least for me, to find all the items so I gave up in the end. Some system to help guide you towards the objectives would've been excellent.
This has a lot of potential for a horror game and I hope this comes off as constructive criticism that'll help you and your team in achieving that.