Directing the photon by moving around pieces of the environment is a really cool idea, and it even was educational! Also a nice touch with the light spectrum. However, it took at the start it took me a bit to figure out what to do/where to go, a short info message would have been nice. And if you go backwards/downwards, the background suddenly goes completely black, I don't know if that was intentional. 

Also, this idea could, if developed further ina slightly different direction, actually make for a nice 360 degree take on the actual game "Breakout". Think like having to move the environment blocks the ball has to destroy into the way of the ball without letting it escape out of the screen

This is a neat little educational game! Not much else to say.