Use the arrow symbols to rotate the image in the middle of the screen to block blue incoming balls while allowing green incoming balls to enter the center of the screen. You get five points for each green ball allowed into the center and you get five points for each blue ball which leaves the screen. You loose five points for each blue ball which enters in the center of the image and you loose five points for each green ball which leaves the screen. There are two life markers at the top left corner of the screen. The green life marker is reduced by one point for each green ball which leaves the screen while the blue life marker is reduced by one point for each blue ball allowed into the image at the center of the screen.

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