A one person Tic Tac Toe game that you play against the phone/tablet, playing as "Bob."
In 4x4 most people discover how to beat Bob, but it takes a while.
5x5 is harder yet, and 6x6 starts getting crazy.
There is very little text, so it works in any language.
Fixed all the bugs, added 5x5, 6x6 and scorekeeping.