Controls are about what you expect, directionals to move cursor and A to place your X or O.

Hidden features:

Start opens a menu where you can reset the game

Select displays a dialog with some information about the AI's decision

B gives up your control of the game and makes the AI fight itself

There are currently two AI opponents in the game:

RandAI makes moves completely at random. Usually it will just let you win, but occasionally it gets lucky.

SimpAI actually looks at the state of the game and tries to make good decisions. It does not plan ahead or strategize, it simply reacts to what it seems. If there is a move that will immediately win the game, it will always choose that. Its next priority is to block the other player. Its third function is to try to make lines, placing a second X or O in line with a first one to set itself up for a win. If none of these options are available, it picks an empty cell at random. Despite not understanding the winning strategy for tic tac toe, it proves to be a formidable opponent, and anything less than a perfect game on the player's part can lead to it winning.