Children play them on computers, using a joystick to control the weapons and movements they see on the computer screen. 孩子们在电脑上玩这些游戏，用控制杆控制电脑屏幕上出现的武器和动作。
Their power was also increased by introducing a control rod which moved up and down with the beam. 因为增加了一根随着吊杆上下移动的控制杆，发动机的功率也增大了。
