I really like this concept! When going through the tutorial I thought there might be too many mechanics for me to remember, but it was actually really intuitive when I got into the action.
The art is really impressive for just nine days.
I agree with some of the other comments about timed traps being inconsistent. I think I encountered a timing-dependent bug, where sometimes the animation would look like a boulder had clearly hit someone, but it wouldn't register as a hit.
I really liked figuring out which trap to use to kill each person, and where to place them. If you could cut down the amount of fiddling required after that moment of realization, I think this would be a super engaging game.