Touchscreen controls in a 2D game

Could you look into my code and tell me what I did wrong? I'm not an experienced programmer. Basically, the code should: 1.After touching the screen, he makes TouchPhase.Began location a point on screen using which we calculate the movement of an "on-screen joystick". With joystick, the player can go right and left 2. If player holds his finger on screen for 1,5 sec, his character is teleported to the location of his finger.

 using UnityEngine;
 using System.Collections;
 
 public class PlayerController : MonoBehaviour {
 
 
     public float speed ;
     public float maxMovement ;
 
     private float touchTime ;
 //    private Rigidbody2D rb;
 
  void Start ()
     {
 //        rb = GetComponent<Rigidbody2D>();
     }
 
 
  void FixedUpdate () 
     {
         if( Input.touchCount != 0 && Input.GetTouch (0) .phase == TouchPhase.Began)
         {
             Vector3 TouchCenter = new Vector3 (Input.GetTouch (0) .position.x , 0 );
             //Vector3 maxMovement = new Vector3 ( maxMovement , 0 );
             if( Input.GetTouch (0) .phase == TouchPhase.Moved)
             {
                 Vector3 joystickMove = new Vector3 (Input.GetTouch (0) .position.x , 0 , 0);
 
                 Vector2 movement = new Vector2 (joystickMove.x - TouchCenter.x , 0);
 
                 if( movement.x >= maxMovement )
                 {
                    transform.Translate( maxMovement * speed , 0 , 0 );
 
 
                     if( Input.GetTouch (0) .phase == TouchPhase.Ended)
                     {
                         transform.Translate( - maxMovement * speed , 0 , 0 );
 
                 }else{
 
                     transform.Translate( maxMovement * speed, 0 , 0 );
                      
                     }
                 if( Input.GetTouch (0) .phase == TouchPhase.Ended)
                     {
                         transform.Translate( - maxMovement * speed, 0 , 0 );
                     }
                 }
             }
             /*else if( Input.GetTouch(0) .phase != TouchPhase.Moved && Input.GetTouch (0) .deltaTime >= 1.5)  That's that teleport thing 
             {
                 transform.position = TouchCenter ;
             }*/
         }
     }
 }