Time for action – follow the y position of the mouse

1. Modify your code to add a few familiar-looking lines:

      function Update ()
      {
       var halfW:float = Screen.width/2;
       transform.position.x = (Input.mousePosition.x - halfW)/halfW;
       var halfH:float = Screen.height/2;
       transform.position.z = (Input.mousePosition.y - halfH)/halfH;
      }

The two new lines of code are almost identical to the first two lines. We've created a new variable and called it halfH (half height) instead of halfW. We're changing the z property of Input.mousePosition instead of x. When you save the Script and test your game, you'll have a fully movable paddle to bounce your ball on.

Tip

Math effect

I actually put a little cheat into my code. I wanted the paddle to travel deeper and farther along the Z-axis with less mouse movement, so I changed my halfH variable declaration to this:

var halfH:float = Screen.height/3;

That's a third of the screen, not a half. Really, I should change the name of my variable to something...