I had such much troubles getting the last part haha. Great atmosphere.
I like the fact the light is getting stronger by finding more elements. However, above 5 or 6 I feel like it it stronger than the seekers light so it hides them... which makes it frustrating when trying to avoid them.
One little detail for improvement might be a camera angle change possible or a way to click for moving when on the edge of the map. Sometimes I got stuck behind a hill and had to click everywhere randomly to be able to move again haha.
Except from that, I agree with the other comments, a little clue on where to find the parts, or when you get closer would be great :)
Simple idea, good enemies, good atmosphere. Good job !