Determines which color player has the first move in the next game.
Chooses who should play for player 1 (yellow). It can be either mouse or keyboard, i.e. a local player using the mouse or keyboard as input device or computer, i.e. the computer plays for this player.
Same as Player 1 played by but for player 2 (red).
Selects the level of the computer player.
Change the names of the players.
Toggle on and off the display of the status bar.