Let me introduce you my second Android game (maybe some of you remember Four in a Row HD, it was featured in XDA Portal last year and it's currently in the top of brain games).
The game allows playing standard Tic Tac Toe, non-gravitational Four in a Line or Freestyle Gomoku in cool boards up to 15x15 made of wood, chalk, sand and neon glow lights featuring multitouch scale and pan.
And...teasing your brain solving over 200 unique and carefully designed game riddles that will test your skills while progressively learning the common winning techniques and strategies.
It's probably the most complete implementation of this kind of games to date. Available for Android 2.2 and later, it supports everything from small phones to large Full HD tablets. It's ad supported and almost a hundred riddles are free to play, by a small-priced in-app purchase ads are removed and all the riddles unlocked.
Suggestions, ratings and error reporting is more than welcome. It's been tested in a Galaxy ACE, Galaxy Nexus JB 4.1.1, Nexus 7, Asus Transformer TF-101 and HTC Desire, but you know that about fragmentation
THANKS & REGARDS from Spain,