Which brings up the point of navigation. The interface is classic 2D Slide show. 3D would have been nice – there was always some angle I would have liked to look at - but 2D does the job. And while the pathways can get very complex, they are tight enough so that you never loose your sense of direction. There is a compass to help you as well.

The only objections I have had were the small hot spots which I missed and the small dabs of color which were easy to miss-read. (It would have been nice if each color also had a unique texture for the benefit of the color-blind.) Otherwise, no complaints.

My final evaluation? This is a independent game written by a single person. That counts for a lot, but there is very little to forgive. Everything short of the voice acting is professional. Knut Mueller wanted to give us a puzzling experience and he nailed it to the wall. If you love puzzles, then you will want this game.