Tesseract!

This is a 4D maze that's presented in 3D rather than 2D like the other one found in the store. The markers for surfaces I had already visited were not entirely clear to me. I love the subtle color scheme, I think I just did not fully understand where the markers are placed. Overall, very nifty. Update: I get it, the markers are for faces I *haven't* visited, duh. I forgot to mention, the algorithm for determining which portal I mean to roll through is VERY good. Most apps I've tried are frustrating in that regard--this one gets it every time, even from awkward angles and even when there are overlapping portals.

This is an engaging visual challenge. You are sort of finding your way through a four dimensional maze, collecting all the dots along the way. It took me a few tries to get the hang of it, and I am still not a master, but once I developed some intuition about what would happen when going through the gates in the walls it got pretty neat.

Challenging and pleasant. Fun to just fiddle with but quite a brain racket. Excellent!