如何阻止 Unity 游戏创建无限游戏对象

问：

我创建了一个简单的Unity游戏，它是关于掉落的立方体的。你必须控制它们，并将相同颜色的立方体放在一起。在 2 或 3 个通常掉落的立方体之后，游戏会创建数百个立方体，Unity 崩溃。无限立方体每种颜色有 4 个不同的立方体预制件。我为它们中的每一个添加了 createCube 脚本。有 Create（） 函数，它在碰撞后被调用：

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

public class createCube : MonoBehaviour
{
    public GameObject redPrefab;
    public GameObject greenPrefab;
    public GameObject bluePrefab;
    public GameObject yellowPrefab;
    private createCube script;
    private SpriteRenderer spriteR;

    void Create()
    {
        int zufall = Random.Range(1,5);
        switch(zufall)
        {
            case 1: Instantiate(redPrefab, new Vector3(0,4.2f,0), Quaternion.identity); break;
            case 2: Instantiate(greenPrefab, new Vector3(0,4.2f,0), Quaternion.identity); break;
            case 3: Instantiate(bluePrefab, new Vector3(0,4.2f,0), Quaternion.identity); break;
            default: Instantiate(yellowPrefab, new Vector3(0,4.2f,0), Quaternion.identity); break;
        }
    }
    void OnCollisionEnter2D(Collision2D coll)
    {
        GameObject otherObject = coll.gameObject;
        script = GetComponent<createCube>();
        script.enabled = false;      
        if (otherObject.CompareTag("Ground"))
        {
            if (GetComponent<SpriteRenderer>().sprite.name == "red")
            {
                gameObject.tag = "Deadred";
            }
            else if (GetComponent<SpriteRenderer>().sprite.name == "green")
            {
                gameObject.tag = "Deadgreen";
            }
            else if (GetComponent<SpriteRenderer>().sprite.name == "blue")
            {
                gameObject.tag = "Deadblue";
            }
            else
            {
                gameObject.tag = "Deadyellow";
            }

        }
        else if (otherObject.CompareTag("Deadred") || otherObject.CompareTag("Deadgreen") || otherObject.CompareTag("Deadyellow") || otherObject.CompareTag("Deadblue"))
        {
            if (GetComponent<SpriteRenderer>().sprite.name == "red")
            {
                gameObject.tag = "Deadred";
            }
            else if (GetComponent<SpriteRenderer>().sprite.name == "green")
            {
                gameObject.tag = "Deadgreen";
            }
            else if (GetComponent<SpriteRenderer>().sprite.name == "blue")
            {
                gameObject.tag = "Deadblue";
            }
            else
            {
                gameObject.tag = "Deadyellow";
            }
        }

        else if (otherObject.CompareTag("Deadred") && gameObject.GetComponent<SpriteRenderer>().sprite.name == "red")
        {
            Destroy(otherObject);
            Destroy(gameObject);
        }
        else if (otherObject.CompareTag("Deadgreen") && gameObject.GetComponent<SpriteRenderer>().sprite.name == "green")
        {
            Destroy(otherObject);
            Destroy(gameObject);
        }
        else if (otherObject.CompareTag("Deadblue") && gameObject.GetComponent<SpriteRenderer>().sprite.name == "blue")
        {
            Destroy(otherObject);
            Destroy(gameObject);
        }
        else if (otherObject.CompareTag("Deadyellow") && gameObject.GetComponent<SpriteRenderer>().sprite.name == "yellow")
        {
            Destroy(otherObject);
            Destroy(gameObject);
        }
        Create();
    }
}

还有 GameObject 地面，用于捕获立方体。它还通过掉落第一个立方体来开始游戏：

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

public class starter : MonoBehaviour
{
    public GameObject redPrefab;
    public GameObject greenPrefab;
    public GameObject bluePrefab;
    public GameObject yellowPrefab;

    void Start()
    {
        int zufall = Random.Range(1,5);
        switch(zufall)
        {
            case 1: Instantiate(redPrefab, new Vector3(0,4.2f,0), Quaternion.identity); break;
            case 2: Instantiate(greenPrefab, new Vector3(0,4.2f,0), Quaternion.identity); break;
            case 3: Instantiate(bluePrefab, new Vector3(0,4.2f,0), Quaternion.identity); break;
            default: Instantiate(yellowPrefab, new Vector3(0,4.2f,0), Quaternion.identity); break;
        }
    }
}

我试图在碰撞后启用脚本，以便立方体无法创建新的脚本，我试图给它们不同的标签，但没有任何改变。我以为这是因为一个立方体与多个物体发生碰撞（例如，地面和立方体同时发生碰撞），但当立方体仅与其他立方体发生碰撞时，也会发生这种情况。