Ok so the premise is very cool and the movement is great and the combat idea is cool BUT the combat really needs some hints and explanations. I only figured out the 2 attacks by looking at Cpt Coder's video after a while and seeing what he did. Don't know if there's more because I tried a ton of combinations but nothing. Also, I had no idea what the "glinting lights" that you interact with do.
I did find a couple of lost souls and managed to send them to the coffin but I didn't get through to the end as I was eventually slain.
There's a really cool game here that could use a bit more UX.