Nice game. I played it with a controller, with only keyboard it is not possible to grant death. The problem with the concept is that once we identified a soul, we must wait/follow it, and no ones like to wait.
I got some suggestion to circumvent this, just ideas:

• Perhaps it could be interesting, to not tell how they suppose to die, but put several ways to die in the level, and the player must discover them and activate one to the soul required... and repeat (but the first way is no more usable)...
• Perhaps what the death know is just the soul (not his human representation), and that soul could represent the soul main sin. Then if the human is  near you can see is soul (no button needed). A death in concordance to the sin can score more.
• To fulfil a level you must get enough points. (so you must match a soul with the better way to kill it)

Hope it helps

Pressing enter just restarts the game? I couldn’t figure out how to kill anyone. There’s a lot of down time where you’re just waiting for a target to move. But I like the idea, could be cool with more refinement.