Transform Position - GUI Button

Hi, i have this script:

 using UnityEngine;
 using System.Collections;
  
 public class Test : MonoBehaviour
 {
     public GameObject Player;
     private Vector2 touchPos;
     private bool show = false;
  
     void Start() {
         GUI.enabled = false;
     }
  
     void Update() {
         if (Input.touchCount > 0 && Input.GetTouch (0).phase == TouchPhase.Began) {
             // SHOW BUTTON
             GUI.enabled = true;
             show = !show;
         }
     }
  
     void OnGUI ()
     {
         if (Input.touchCount > 0) {
  
             //TOUCH POSITION
             Touch touch;
             touch = Input.GetTouch (0);
  
             touchPos.x = touch.position.x;
             touchPos.y = Screen.height - touch.position.y;
         }
  
         if (show) {
             // GUI BUTTON POSITION = TOUCH POSITION
      
          if (GUI.Button (new Rect (touchPos.x + 30, touchPos.y + 30, 300, 100), "Teleport")) {
  
                 // TRANSFORM POSITION - HIDE BUTTON
                 Player.transform.position = Camera.main.ScreenToWorldPoint (Input.GetTouch (0).position);
                 GUI.enabled = false;
                 show = !show;
          
             }
         }
     }
 }

With the first touch I decide the position of the button, after finishing the phase of touch the button remains open. With the second touch on the button I decide the position of the player but I have a problem: When I use the touch on the button should be two fingers on the screen otherwise the player position is not changed, how can I make the button work with just one finger ?

Thanks in advance.