I believe I came across a few bugs - occasionally rival cultists would be dead in the wrong order, or occasionally, many would die upon re-entering a room where I killed only one person.
It still is unclear to me how to collect the parts - I got a tongue and didn't notice picking it up, and because of the multiple deaths bug, couldn't collect 10 hearts.
A sprint would go a long way for the design. Overall, very beautiful and a lot of potential.