I like the concept, but it needs more levels and something more, a little "oomph" if you know what I mean.
Concept is good
As bob6294 and Lonestar suggested, add additional stuff such as colour splitting, blockade,teleportation devices and from me, maybe make the angles differ more so its not a 50-50 chance that the angle is good. Maybe slightly displacing the mirrors/reflectors abit will give a different angle to work on, making it tougher.
Pretty good pretty good
I would have the reflectors be click and drag so that it's not so obvious as to how to turn the reflectors.
Also try adding differen't things like splitting channels, different colors (as Lonestar suggested), blockades so that the paths have to differ, and perhaps even teleportation devices. Who knows.
Lots of potential!
Awesome, but too short!
just needs more levels :D