TicTacToe in two dimensions is fun, but if two players are equally good, you will always end up with a draw because of the limited possibilities to win. In fact, in 2D TicTacToe there are 8 possibilities to win. In TicTac3D there are 49 possibilities to win, which makes it more fun. Also, TicTac3D is played with 3 players, so you have to be extra careful and have a very good strategy to be able to win.
In the game you can buy power-ups to help you. You can earn coins to buy power-ups by winning games or by in app purchases.