Fun concept! It was quite tough to get more than a few gems. I tried to decrease my light and run away, but they easily caught me. The movement is very "pac-man" as in you move until you hit a wall. But it's also quite zoomed in, so I don't have much peripheral vision. Maybe it would be a bit easier if the movement was more directly controlled and this applied to enemies too, so they would stop following you and return to a patrol route or something when you turn off your light? Feels like a bit of tweaking could make this much more interesting :)