After my post yesterday on Flappy Bird, my brother pointed out that a big part of the attraction was the punishing difficulty level, and bragging rights. If need a really hard game that’s insanely addictive, you can’t do better than Terry Cavanagh’s Super Hexagon.
You control a triangle dodging rapidly rotating walls in a hexagonal pattern. The controls tight and responsive, and are well suited to a touch device. The game is $2 on the app store. You can try the original game jam version on Cavanagh’s site.