ufo/Assets/Script/GameManage.cs

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

public class GameManage : MonoBehaviour
{
    private static GameManage instance;
    public static GameManage Instance
    {
        get
        {
            return instance;
        }
    }

    public GameObject overPanel;
    public GameObject player;

    // Use this for initialization
    void Start()
    {
        instance = this;
    }

    // Update is called once per frame
    void Update()
    {

    }
    
    public void ResetGame()
    {
        SceneManager.LoadScene("main");
    }

    public void GameOver()
    {
        overPanel.SetActive(true);
        Destroy(player);
    }
}