How do I change this 2D script to touch controls to go up and down with swipe or on screen buttons?

Plz help me with this player script i'm a beginner on unity and i'm making a 2D game i want to change the controls from key-inputs to touch control but i don't know how to make it work, i want to make the player move up or down a specific amount plz help and thank you for reading.

This is the script that i use for the movement

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.UI; using UnityEngine.SceneManagement;

public class Player: MonoBehaviour {

 private Vector2 tragetPos;
 public float Yincrement;

 public float speed;
 public float maxHeight;
 public float minHeight;

 public int health = 3;

 public Text healthDisplay;




 private void Update()
 {


     healthDisplay.text = health.ToString();


     if (health <= 0)
     {

         SceneManager.LoadScene("GameOver");

     }




     transform.position = Vector2.MoveTowards(transform.position, tragetPos, speed * Time.deltaTime);


     if (Input.GetKeyDown(KeyCode.UpArrow) && transform.position.y < maxHeight) {
         tragetPos = new Vector2(transform.position.x, transform.position.y + Yincrement);

     } else if (Input.GetKeyDown(KeyCode.DownArrow) && transform.position.y > minHeight) {
         tragetPos = new Vector2(transform.position.x, transform.position.y - Yincrement);


     }
 }

}