Tic Tac Toe Logic

Main features:
**Play in traditional gamemode, where you have to fill a grid with Xs and Os so there are no more than 2 of either in a row or column and so there's the same number of both in every row and column
**Play in experimental gamemode, which adds new wrapping and diagonals rules!
**Interactive tutorial for each gamemode
**New free puzzles every day!
**Battery saving mode to keep you going for hours