This is a pretty solid entry. I really liked the VFX and overall atmosphere of the game, it feels like a lot of effort went into the soundscape and lighting.
Mechanically, I never really knew exactly what I was doing. Throwing the stone made rings grow outwards from where it landed, but I never processed what that was actually doing. I didn't even know I had an inventory that I could scroll through at first; when I did realize that, I gathered the first soul echo thing by randomly using stuff I had, without really knowing what I was actually doing.
I also got rocked by the reaper, I didn't know what to do to avoid it :(
Regardless, I think you did a great job!