Instantiate cloning TOO MANY!

my rocket is shooting one at first key press

then 4 then 10 then like triple then huge amount more?? and after about 5 seconds I am not even able to shoot more nothing comes out..

These scripts are java and c+ 2D game Again this is all 2D !

why is this happening I have 3 scripts on the rocket and prefab rocket

1 rocket

2 forces

3 destrooyrocket

please help and if possible post corrected script and point out what im doing wrong, its clearly something in scripting I think something with addforce and insatiate. I have checked related questions and tutorials.. and for 2d addforce is tricky and different but I cant find what to put ..most info in tutorials is for 3d on addforce not 2d ?

thanks

script 1 rocket--

 #pragma strict
 
 public var rocketPrefab : Rigidbody2D;
 public var barrelEnd : Transform;
 
 
 
 
 
 function Update ()
 {
     if(Input.GetButtonDown("Fire1"))
     {
         var rocketInstance : Rigidbody2D;
         rocketInstance = Instantiate(rocketPrefab, barrelEnd.position, barrelEnd.rotation);
         rocketInstance.AddForce(barrelEnd.forward * 3000);
         
         //rigidbody2D.AddForce(Vector3.up.down * Time.deltaTime);
 
         
         
     }
 }

script 2 forces--

 using UnityEngine;
 using System.Collections;
 
 public class forces : MonoBehaviour 
 {
 
 
         public float moveSpeed = 22f;
         
         
         void Update()
        {
             
                 //Jump Script
         rigidbody2D.AddForce(Vector2.up * Time.deltaTime);
             }
     }

script 3 destrooyrocket--

 #pragma strict
 
 function Start ()
 {
     Destroy (gameObject, 1.5f);
 }