经过完善后，最后所有的代码是哪些

经过完善后的`DestroyByContact` 和 `GameController` 类的代码会包含上述提到的UI提示和按键交互的部分。以下是合并后的完整代码：

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

public class DestroyByContact : MonoBehaviour
{
    public GameObject explosion;
    public GameObject playerExplosion;
    public GameObject gameOverMessage; // 新增的UI游戏结束提示
    private GameController gameController;

    void Start()
    {
        GameObject gameControllerObject = GameObject.FindWithTag("GameController");
        if (gameControllerObject != null)
        {
            gameController = gameControllerObject.GetComponent<GameController>();
        }
        if (gameController == null)
        {
            Debug.Log("Cannot find 'GameController' script");
        }
    }

    void OnTriggerEnter(Collider other)
    {
        if (other.tag == "Boundary")
        {
            return;
        }
        Instantiate(explosion, transform.position, transform.rotation);

        if (other.tag == "Player")
        {
            Instantiate(playerExplosion, other.transform.position, other.transform.rotation);
            if (gameController != null)
            {
                gameController.GameOver();
            }
        }
        Destroy(other.gameObject);
        Destroy(gameObject);
    }

    public void OnEscapeKeyDown()
    {
        // 增加对 'Esc' 键的监听，可以在Update()里检查
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            gameController.RestartGame(); // 假设GameController有一个RestartGame方法
        }
    }
}

public class GameController : MonoBehaviour
{
    public GameObject hazard;
    public Vector3 spawnValues;
    public int hazardCount;
    public float spawnWait;
    public float startWait;
    public float waveWait;
    private int score = 0;
    public TextMeshProUGUI scoreText;
    public TextMeshProUGUI gameOverText;
    public TextMeshProUGUI helpText;
    private bool gameOver;
    private float fadeAlpha = 0; // 透明度值
    private float fadeSpeed = 2f; // 淡入速度
    public GameObject gameOverMessageDisplay; // 原有的提示UI

    void Start()
    {
        gameOver = false;
        gameOverText.text = " ";
        helpText.text = " ";
        StartCoroutine(SpawnWaves());
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.R))
        {
            int currentSceneIndex = SceneManager.GetActiveScene().buildIndex;
            SceneManager.LoadScene(currentSceneIndex);
        }
        
        // 添加 Esc 键监听
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            OnEscapeKeyDown();
        }
    }

    public void GameOver()
    {
        gameOver = true;
        gameOverText.text = "Game Over!"; 
        helpText.text = " Press 'R' to Restart or 'Esc' to Continue...";

        // 显示游戏结束提示
        gameOverMessageDisplay.SetActive(true);
        StartCoroutine(FadeOutMessage());
    }

    public void RestartGame()
    {
        gameOver = false;
        gameOverText.text = " ";
        helpText.text = " Press 'R' to Restart or 'Esc' to Continue...";

        // 清除游戏结束提示
        gameOverMessageDisplay.SetActive(false);
        // 渲染新的游戏界面或加载新场景
    }

    IEnumerator FadeOutMessage()
    {
        float fadeInTime = 1f; // 淡出时间，单位秒
        while (fadeAlpha < 1)
        {
            fadeAlpha = Mathf.Lerp(fadeAlpha, 1, Time.deltaTime / fadeInTime);
            gameOverText.color = new Color(gameOverText.color.r, gameOverText.color.g, gameOverText.color.b, fadeAlpha);
            gameOverMessageDisplay.SetActive(false); // 隐藏提示UI
            yield return null;
        }
        // 清除提示文本
        gameOverText.text = "";
        gameOverMessageDisplay.SetActive(false);
    }

    public void addScore(int value)
    {
        score += value;
        UpdateScore();
    }

    private void UpdateScore()
    {
        scoreText.text = "Score: " + score.ToString();
    }

    IEnumerator SpawnWaves()
    {
        yield return new WaitForSeconds(startWait);
        while (true)
        {
            for (int i = 0; i < hazardCount; i++)
            {
                Vector3 spawnPosition = new Vector3(Random.Range(-spawnValues.x, spawnValues.x), spawnValues.y, spawnValues.z);
                Quaternion spawnRotation = Quaternion.identity;
                Instantiate(hazard, spawnPosition, spawnRotation);
                yield return new WaitForSeconds(spawnWait);
            }
            yield return new WaitForSeconds(waveWait);
            if (gameOver)
            {
                break;
            }
        }
    }
}