Need little help with my Script i want to Add Min Height and Maxheight in ButtonScript

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 using UnityEngine.UI;
  
 public class Player : MonoBehaviour {
  
     private Vector2 targetPos;
     public float Yincrement;
  
     public float speed;
     public float maxHeight;
     public float minHeight;
  
     public int health = 3;
  
     public GameObject effect;
     public Animator camAnim;
     public Text healthDisplay;
     public GameObject character;
  
     private Rigidbody2D characterBody;
  
     public GameObject gameOver;
     public GameObject popSound;
  
     private void Update()
     {
  
  
             healthDisplay.text = health.ToString ();
  
             if (health <= 0) {
                 gameOver.SetActive (true);
                 Destroy (gameObject);
             }
            
             transform.position = Vector2.MoveTowards (transform.position, targetPos, speed * Time.deltaTime);
  
             if (Input.GetKeyDown (KeyCode.UpArrow) && transform.position.y < maxHeight) {
                 Instantiate (popSound, transform.position, Quaternion.identity);
                 camAnim.SetTrigger ("shake");
                 Instantiate (effect, transform.position, Quaternion.identity);
                 targetPos = new Vector2 (transform.position.x, transform.position.y + Yincrement);
  
             } else if (Input.GetKeyDown (KeyCode.DownArrow) && transform.position.y > minHeight) {
                 Instantiate (popSound, transform.position, Quaternion.identity);
                 camAnim.SetTrigger ("shake");
                 Instantiate (effect, transform.position, Quaternion.identity);
                 targetPos = new Vector2 (transform.position.x, transform.position.y - Yincrement);
  
             }
         }
  
     public void BtnUp()
     {
         transform.position += Vector3.up;
         Instantiate (popSound, transform.position, Quaternion.identity);
         camAnim.SetTrigger ("shake");
         Instantiate (effect, transform.position, Quaternion.identity);
         targetPos = new Vector2 (transform.position.x, transform.position.y + Yincrement);
     }
  
     public void BtnDown()
     {
         transform.position -= Vector3.up;
         Instantiate (popSound, transform.position, Quaternion.identity);
         camAnim.SetTrigger ("shake");
         Instantiate (effect, transform.position, Quaternion.identity);
         targetPos = new Vector2 (transform.position.x, transform.position.y - Yincrement);
     }
 }

Guys any one know how will i put the right code in my BtnUp and BtnDown script because i want to add more function like i want BtnUp and BtnDown to have limit in clicking like he will just Go up in 2-3 times and Down with a limit of 2-3 times to Down so i wont flew through the scene :D little bit confused on how ill put the right code for it ive tried and read lots of codes and i cant find similar with my problem and i cant find the right code pleasee help thankyou newbie only :D and doing my first game hehehe thankyou guys HELP :D