I made the game space shooter in Unity and in this game i have a 3 buttons. 1) Left 2) Right 3) Fire but i want the player continuously shoot (fire) and its movement from left to right work with thumb.

This are the some code which I used in the game.

shootscript.cs

using UnityEngine;
using System.Collections;

public class ShootScript : MonoBehaviour {

    public int dammage = 0;
    public bool isEnemyShot = true;
    public Sprite lightDestroy;
    public float laserTime = 500;
    private float increament;


    void Update()
    {
        laserTime += Time.deltaTime;
        if (laserTime <= 0) {
            Destroy(gameObject);
        }
    }


    void FixedUpdate()
    {
        if (!isEnemyShot) {
            this.transform.Translate (Vector2.up * 8f * Time.deltaTime);
        } else {
            this.transform.Translate (Vector2.up * -3 * Time.deltaTime);
        }
    }

    void OnCollisionEnter2D( Collision2D coll)
    {
        if (coll.gameObject.tag == "Player" || coll.gameObject.tag == "Enemy") 
        {
            gameObject.transform.localScale = new Vector2 (1, 1);
            gameObject.GetComponent<SpriteRenderer> ().sprite = lightDestroy;
            gameObject.GetComponent<BoxCollider2D> ().isTrigger = true;
            Destroy (gameObject, 2.0f);
        } else {
            Destroy(gameObject);
        }
    }
}

TouchControl.cs

using UnityEngine;
using System.Collections;

public class TouchControl : MonoBehaviour {

    public GUITexture moveLeft;
    public GUITexture moveRight;
    public GUITexture fire;
    public GameObject player;
    private PlayerMovement playerMove;
    private Weapon[] weapons;

    void Start()
    {
        playerMove = player.GetComponent<PlayerMovement> ();
    }

    void CallFire()
    {
        weapons = player.GetComponentsInChildren<Weapon> ();
        foreach (Weapon weapon in weapons) {
            if(weapon.enabled == true)
            weapon.Fire();      
        }
    }

    void Update()
    {
//      int i = 0;
        if(Input.touchCount > 0)
        {
            for(int i =0; i < Input.touchCount; i++)
            {
//          if(moveLeft.HitTest(Input.GetTouch(i).position, Camera.main))
//          {
//              if(Input.touchCount > 0)
//              {
//                  playerMove.MoveLeft();