Checkpoint.cs

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

public class Checkpoint : MonoBehaviour
{
    private Animator anim;
    
    void Start()
    {
        anim = GetComponent<Animator>();
    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.gameObject.tag == "Player")
        {
            anim.SetBool("idle", true);
            GameController.instance.ShowNextLevel();
        }
    }
}