The normal Tic-Tac-Toe is the regular game. Same rules, same noughts and crosses, same everything. Concentration mode has the same rules, but you can't see the moves you/the other player make, so you really have to concentrate. In this mode, each number relates to a square, starting at the top-left square working down; so 1 = top-left box, 2 = top-middle box, 3 = top-right, 4 = middle-left, and so on. Scores shows how many games you've won/lost/tied in a percentage, and how many games on average are won/lost/tied. Have fun! (Not that Tic-Tac-Toe is the best game on Earth, but yeah)
i added music all other credit to prinseskat