This game starts when the stick hits the white ball, which then collide with some of the billiard balls, causing a movement across the screen, the game ends when any of the billiard balls touch any border of the screen, additional balls appears periodically and join the set, and follow the same logic, also the white ball appear and disappear periodically, collide with billiard balls randomly.
You have to drive the billiards balls away from the borders of the screen, either by touching the ball, or by sliding one of the two yellow rectangles up and down against the ball and prevent it from hitting the border and lose the game.
This game tests your patience and the score represent your tolerance.