How to play
Take turns to place a mark. Get four in a straight line to win.
Lines can run along a layer, up through the layers, or diagonally through the cube. There are 76 lines.
Point at a cell to light up the cells above and below it.
Time limits work like a chess clock. Set a limit for each player's whole game, a limit per move, or both. A player who runs out of either limit loses. The first move of each player is untimed. A change during a game starts with the next game.
Lock settings keeps every setting, the view included, until the game ends. Online, the lock and the hide options apply to both players.