CheckWin.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
public class CheckWin : MonoBehaviour
{

    void Update()
    {
        if(GameSystem.MonsterCount == 0 && GameSystem.HP > 0)
        {
            GameObject[] enemis = GameObject.FindGameObjectsWithTag("Enemy");
            if(enemis.Length == 0)
            {
                SceneManager.LoadScene("WinLevel");
            }
        }
    }
}