Inverted Vertaical (W,S) controls with a rolling ball.

I am creating a small demo game to test out game development myself and I am creating a rolling ball in a 3D space controlled by the user to go through a course and progress to the next level. But converting from 2.5D to 3D I have found my control for the ball going forward and backward are reversed. W is moving the ball back, and S is moving it forwards.

How can I fix this?

EDIT: I have tried rotating the camera to the other side of the ball to invert that, but this causes my A&D keys to be inverted, as expected.

 var rotationSpeed = 100; 
 var pushSpeed = 1;
 var jumpHeight = 8;
   
 
 private var isFalling = false;
 
 function Update () 
 {
     //Handle ball rotation
     var rotation : float = Input.GetAxis ("Horizontal") * rotationSpeed;
     rotation *= Time.deltaTime;
     GetComponent.<Rigidbody>().AddTorque (Vector3.back * rotation);
 
     var rotationv : float = Input.GetAxis ("Vertical") * pushSpeed;
     rotation *= Time.deltaTime;
     GetComponent.<Rigidbody>().AddForce (Vector3.back * rotationv);
 
 
     //Handle ball jump
     if (Input.GetKeyDown (KeyCode.Space) && isFalling == false)
     {
         GetComponent.<Rigidbody>().velocity.y = jumpHeight;
     }
     isFalling = true;
 }
 
 //Prevents infinite Jumps
 function OnCollisionStay ()
 {
     isFalling = false;
 }
 

This is the script I have for controlling the ball's movement and jumping.

Also if there is any way I should clean this script up for any reason, let me know! :)