Two Ball Rotation-Control the balls to avoid obstacles

Duet is a very funny game. When you are waiting for the bus, the moment of the game starting, or you are boring during the class etc, you could have a try. It is really a necessary equipment during the life or traveling. How to describe it? The artifact to against the boring? Or the artifact to vent? Even you could exercise your reaction during the game. If you are the incompetent of all kinds of games, dont worry. You will be out of the line of incompetent after you play DUET game. Let me tell you secretly, look the two tiny balls as the steering wheel, and you are the experienced driver. Isn...