Every Thursday, Apple chooses an iOS app or game as its own Free app of the week. The title selected this time was Octagon, game developed by Lukas Korba.
It is a kind of game of arcade / puzzle with a futuristic 3D look that mixes elements there 8 bits. It has a few different modes, infinite random levels, synchronization via iCloud and Game Center support.
Check out the video:
Octagon typically costs $ 2 on the App Store. Enjoy!