What a wonderful little game! The aesthetic is striking and really foregrounds the gameplay; I knew straight away I needed to avoid those rays. That running-away-from-the-light mechanic is really interesting; it meshes platforming with a bit of puzzling (though the mechanic doesn't really have much to do with "joined together", imh)
I guess my main criticism is that I want more. I'd like to see levels where you have to make pathing choices, based on where the glass blocks are.
All in all though, I think I had more fun playing this than any game so far, so really well done!