This is such an interesting perspective, and the joined beam of visibility concept is genius. Made me feel like a kid again, playing Pokémon, trying to get through that cave without Flash. The music made me feel at times like I was in some blockbuster.
Had a strange issue in level 7, though, where I was able to walk off the edge of the floor in a specific spot and just float around over the darkness.
Overall, great entry, excellent work!