Невозможно получить ссылку на объект

using System.Collections;
using System.Collections.Generic;
using System.Linq.Expressions;
using UnityEditorInternal;
using UnityEngine;
using UnityEngine.SceneManagement;
public class Character : MonoBehaviour
{
public float speed = 7.2F;
    private float HorizontalMove = 0f;
    public bool FacingRight;
    public bool isFacingRight=true;
 
    
    private void Awake()
    {
 
        rigidbody = GetComponent<Rigidbody2D>();
    }
 
    private void Update()
    {
        HorizontalMove = Input.GetAxisRaw("Horizontal");
       
      if(HorizontalMove<0 && FacingRight)
        {
            Flip();
        isFacingRight = false;
        }
        else if(HorizontalMove>0 && !FacingRight)
        {
            Flip();
      isFacingRight = true;
        }
    }
 
  
   
            private void FixedUpdate()
    {
        Run();
           
    }
 
    void Run()
    {
        Vector2 targetVelocity = new Vector2(HorizontalMove * speed, rigidbody.velocity.y);
        rigidbody.velocity = targetVelocity;
        animator.SetFloat("MoveX", Mathf.Abs(HorizontalMove));
    }
 
   
 
    void Flip()
{
    FacingRight = !FacingRight;
 
    Vector3 theScale = transform.localScale;
    theScale.x *= -1;
    transform.localScale = theScale;
 
}
 
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class Shoot : MonoBehaviour
{
 
    public float fireRate = 0.2f;
public Transform shotPos;
 
    public GameObject bullet;
 
    Character ch; 
 
    // Start is called before the first frame update
    void Start()
    {
        ch = gameObject.GetComponent<Character>();
    }
 
    
    void Update()
    {
        if (Input.GetButton("Fire1") && timeUntilFire < Time.time&& ammo>0)
        {
            PlShoot();  
        }
    }
 
  void PlShoot()
    {
        float angle = ch.isFacingRight? 0f : 180f;
 
        Instantiate(bullet, shotPos.position, Quaternion.Euler(new Vector3(0f, 0f, angle)));
 
    }
 
 
 
   
}