Very cool puzzle game. But I sounds are definetly missing. Just a lazer sound would be enough. And more levels please. Also its very polished. I discorvered 0 bugs. I love the fact, that "things" are running around after time. Its annoying but fun!
I think you should develop further on this and release it on steam!
Also i think it would be interesting to have semi-transparent mirrors. And it would be fun, if the "things" fall down, when they are hit by a beam.
I love, that "things" are called "things"