Unity2d -- character moves and turns

stay Unity Control character movement and turning function in

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

public class PlayerContral : MonoBehaviour
{
    
    Animator animator;
    // Judge whether it faces the right 
    public bool facingRight = true;
    // Movement speed 
    public float runSpeed = 5;

    
    Rigidbody2D rigidbody;
    
    Quaternion _rotation;

    void Start()
    {
    
        rigidbody = GetComponent<Rigidbody2D>();

        animator = GetComponent<Animator>();

        _rotation=transform.rotation;
    }
    void Update()
    {
    
        // Playback of walking animation 
        if (Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.S) || Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.D))
        {
    
            animator.SetBool("walk", true);
        }
        else {
     animator.SetBool("walk",false); }

        float h = Input.GetAxis("Horizontal");
        float v = Input.GetAxis("Vertical");
        // Set up mobile 
        rigidbody.velocity=new Vector2 (h*runSpeed,v*runSpeed);
        // Set the turning function 
        if (h > 0 && !facingRight) {
     Filp(); }
        else if (h < 0 && facingRight) {
     Filp(); }
    }
    public void Shuchu() {
    

    }
    void Filp() {
    
        facingRight = !facingRight;

        //Vector3 theScale = transform.localScale;
        //theScale.x *= -1;
        //transform.localScale = theScale;

        _rotation.y += 180;

        if (_rotation.y >= 360) {
     _rotation.y -= 360; }
        transform.rotation = _rotation;
    }
}

Through the above code, you can realize the character's walking animation and mobile turning