Dragging Pong paddles with touch?

I have created a simple pong game with 2 player paddles. I currently have keyboard inputs working to move each of them but i cannot seem to get my touch script to work for mobile use. I have looked at so many tutorials and still can't figure out what is wrong. I have it attached to an empty game object. Here is my code:

using UnityEngine; using System.Collections;

public class touchTest : MonoBehaviour {

 public GameObject GO; //refer to GO that being dragged

 public Vector2 GOcenter; //gameobjectcenter
 public Vector2 touchPosition; //touch or click position
 public Vector2 offset;//vector between touchpoint/mouseclick to object center
 public Vector2 newGOCenter; //new center of gameObject

 RaycastHit hit; //store hit object information

 public bool touching = false;


 // Use this for initialization
 void Start()
 {

 }

 void FixedUpdate()
 {




     foreach (Touch touch in Input.touches)
     {
         switch (touch.phase)
         {

             case TouchPhase.Began:

                 Ray ray = Camera.main.ScreenPointToRay(touch.position);


                 if (Physics.SphereCast(ray, 0.3f, out hit))
                 {
                     GO = hit.collider.gameObject;
                     GOcenter = gameObject.transform.position;
                 touchPosition = Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position);
                     offset = touchPosition - GOcenter;
                     touching = true;
                 }
                 break;

             case TouchPhase.Moved:
                 if (touching == true)
                 {
                     touchPosition = Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position);
                     newGOCenter = touchPosition - offset;
                     gameObject.transform.position = new Vector2(-20f, newGOCenter.y);
                 }
                 break;

             case TouchPhase.Ended:
                 touching = false;
                 break;
         }
     }

 }

}