Ghosting bug on my android device

When running the app in my unity it performs just fine, but after building the app, installing the .apk, and running it on my device I get a ghosting bug on my moving cubes.

In unity

on my device

This is my code, I have a cube spawner that makes instances which move from the center of the screen towards where the screen was touched:

Spawner.js

 var Cam : Camera;
 private var screenCenter = Vector2(Screen.width/2, Screen.height/2);
 private var pos : Vector3; 
 var Fireball : Transform;
 
 function Start () {
 
 }
 
 function Update () {
 
 
 if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began) {
 pos = Input.GetTouch(0).position;
     var hit: RaycastHit;
     var ray : Ray = Cam.ScreenPointToRay (pos);
     
     
     if (Physics.Raycast(ray, hit)) {
                 if (hit.rigidbody != null){
                     if (hit.collider.gameObject.name == "Screen Plane") {
                         SpawnFireball (hit.point);
                     }
                 }
             }
     }
 }
 
 function OnGUI () {
 GUI.Label (Rect (pos.x-10, (Screen.height-pos.y)-10, 300, 20), "x="+pos.x+" y="+(Screen.height-pos.y));
 }
 
 function SpawnFireball (Lookatpoint: Vector3) {
 
 
                         var fireballInstance = Instantiate(Fireball, Vector3 (0, 0, 0), Quaternion.identity);
                           fireballInstance.transform.position = Vector3 (0, 0, 0);
                           fireballInstance.transform.LookAt(Lookatpoint);
 }

Fireball.js

 function Start () {
 Destroy (gameObject, 3);
 }
 
 function LateUpdate () {
 
 transform.Translate(Vector3.forward * Time.deltaTime * 5);
 }