For those of you that like the 'reflect the beam of light puzzles', this is the casual game for you. It is a tablet game (not PC); I have been playing it on my iPad. As the levels progress, they get more challenging. The mirrors rotate and slide, and there are gates that need to be bypassed. You must pass the beam through 3 stars to collect your points. It is really an addictive game. I bought mine from the Apple App Store.