Awesome game ! The art and the level design are really good, and the tutorial explain quite well the mechanics. The Level 2 is a little bit too hard in my opinion, the timing has to be perfect, and because that's the first time we see wooden boxes we want to use them to block light but there are useless in that level. Overall i loved it ! Really good use of the restriction.
PS: how did you do for damaging the player with light ? Did you use raycasts ? I'm interested !