Making 2d gun system but getting problem.

My codes are here.

My player movement code,

 var speed = 25.0f;
 var health = 5;
 var dmg = 1;
 var X : float;
 public var bl : boolean;
 var firePrefab : Transform;
 var barrelEnd : Transform;
 
 function Start(){
     X = transform.localScale.x;
 }
 function Update () {
     
     if(Input.GetKey(KeyCode.D)){
         transform.position.x += speed * Time.deltaTime;
         transform.localScale.x = X;
         bl = true;
     }
     
     if(Input.GetKey(KeyCode.A)){
         transform.position.x -= speed * Time.deltaTime;
         transform.localScale.x = -X;
         bl = false;
     }
     
     if(Input.GetKey(KeyCode.W)){
         transform.position.y += speed * Time.deltaTime;
     }
     
     
     if(health == 0){
         Application.LoadLevel(0);
     }
     
     if(Input.GetKey(KeyCode.Space)){
         Instantiate(firePrefab, barrelEnd.position, barrelEnd.rotation);       
     }
     
     
     
 }
 
 function OnCollisionEnter(col : Collision){
     
     if(col.gameObject.name == "EnemyRight"){        
         health -= dmg;        
     }
     
     if(col.gameObject.name == "EnemyLeft"){        
         health -= dmg;        
     }
     
 }

And my Fire script here,

 var speed = 5.0f;
 var Player : GameObject;
 private var mov : Movement;
 
 function Awake () {
 mov = Player.GetComponent(Movement);
 }
 
 
 function Update(){
 
     if(mov.bl == true){
         transform.position.x += speed * Time.deltaTime;
     }
     
     else if(mov.bl == false){
         transform.position.x -= speed * Time.deltaTime;
     }    
 }
 
 function OnTriggerEnter(col : Collider){
     if(col.gameObject.name == "EnemyRight"){
         Destroy(col.gameObject);
     }
     if(col.gameObject.name == "EnemyLeft"){
         Destroy(col.gameObject);
     }
 }

My problem is when I press Spacebar it instantiate bullet there is no problem it absoluetly work well but when I turn left my bullet turn left in the same way.

How I fix it and how I make realistic 2d gun physics. If you don't understand I can make video :)

Thanks :)