Allow the Green balls to reach the orb in the center of the screen while blocking the blue balls to keep them from reaching the center of the screen. Use the right and left arrow keys to rotate the semi-circular object located toward the center of the screen to block blue balls from entering the center of the screen while allowing green balls to enter the center of the screen. For each green ball that hits the orb in the center of the screen you get 10 points. For each green ball that is reflected out of the screen with the semi-circular object you lose 10 points. For each blue ball that hits the orb in the center of the screen you lose 10 points. For each blue ball that is reflected out of the screen with the semi-circular object you gain 10 points. The game lasts for 3 minutes before you are given options to replay the game, submit a high score or return to the main menu. More balls are introduced into the game as time goes on.

Use the right and left arrow keys to rotate the semi-circular object located toward the center of the screen to block blue balls from entering the center of the screen while allowing green balls to enter the center of the screen.