This is a great concept! It definitely needs a tutorial (I only learned how to play by reading other comments), but I like the idea. I found it quite difficult; I only managed to get past a few of the horned enemies before I had to give up. Controlling the balls was tricky and the horned enemies were a bit frustrating to get past, but the snakes were fun. I think it would benefit from a more lenient outside-the-light check and more feedback that you are about to go outside of the light. The visuals and music are solid though. Nice work!