You get points for removing balls from the board. Only horizontal, vertical and diagonal lines consisting of five or more same-colored balls are removed from the board. You can build such lines by moving the balls around. A ball can move along vertical and horizontal (but not diagonal) lines as long as there is a clear path from the ball's current location to the destination.

You can move one ball at a time regardless of the length of its path. After each move, three new balls appear on the board, their colors and locations are chosen randomly. Every next move is going to be more difficult. You get an extra move every time you destroy a line. The game ends when the board is completely filled with the balls.

Enjoy!