Instructions: Click on a ball and then click on an empty square to move that ball.(The ball can move only if there is a free path) When you line up 5 balls of the. Lines game to play online is an addicting strategy game where the player is challenged to keep the board empty by strategically eliminating lines of five balls of. Lines. To move a ball, click on it with the mouse (circle will appear) to select it, then click on a free cell in a field. To deselect a ball just Game goal is to arrange balls of the same colour in a straight lines (every direction). 5 or more balls on a.