I have attached this script onto my gun object bu the bullet only fires in one direction,I have attached this code my gun but the bullet only fires in one direction

using System; using UnityEngine; public class ShootMissle : MonoBehaviour {

 public GameObject spawnPoint;
 public GameObject ExplosionPrefab;
 public Rigidbody projectilePrefab;


 // Use this for initialization
 void Start () {

 }

 // Update is called once per frame
 void Update () {

     if(Input.GetButtonDown("Fire1"))
     {
         Rigidbody hitPlayer;
         hitPlayer = Instantiate(projectilePrefab, transform.position, transform.rotation) as Rigidbody;
         hitPlayer.velocity = transform.TransformDirection(Vector3.forward * 100);
         //            Physics.IgnoreCollision ( projectilePrefab.collider, transform.root.collider );


     }


     for(var i =0; i < Input.touchCount; ++i)
     {
         if(Input.GetTouch(i).phase == TouchPhase.Began )
         {
             Rigidbody clone;
             clone = Instantiate(projectilePrefab, transform.position, transform.rotation) as Rigidbody;
             clone.velocity = transform.TransformDirection(Vector3.forward * 200);
             //            Physics.IgnoreCollision ( projectilePrefab.collider, transform.root.collider );


         }
     }



 }

}

 ,