Making a horror game as a JAM submission is very bold, so that suprised me in a good way, as making this kind of game requires a really good insight on the player behaviour (which takes lots of time).
I like the unusual artistic direction and the stressfull music, you really nailed that part.
The thing that may be lacking the most is the sense of danger growing stronger when collecting bells, as you would feel playing games like slenderman. I dont know if you didn't code it or if I was just lucky, but collecting bells didn't seem to affect the "entity" or endanger me.
On a side note, I don't understand why we're holding a flashlight, because the skybox is so bright and the bells essentially shines from far away, I found myself not making use of this item at all.
The last bits of my comment may seem rather negative, however, I really think that for a horror game made for a JAM, the mood is really nicely set, well done !