Move tiles to connect lines of at least four of the same color to make them disappear. You can connect lines in rows, columns or diagonals. New tiles appear after a move when you don't form a line of 4. Whenever you make a mistake, you can use undo, but its use is limited. You can also use the Move Anywhere feature to move a tile to any unoccupied spot on the board. These features are earned by leveling up or forming 2 lines in a single move.