使用键盘上下键操作，按【上】母体逆时针旋转，按【下】顺时针，右方吹管会射出小球，避免小球撞击母体，让小球从母体中间空隙穿越，游戏共4关。 Using the keyboard up and down button operation, according to [parent] counterclockwise rotation, according to [down] clockwise, the right side blowpipe will shoot out the ball, avoid ball impacting the parent, let the ball pass through the middle gap of the parent, the game has 4 passes.
