问如何让我的爆炸召唤代码工作

EN

using UnityEngine;
using System.Collections;

public class Rocket : MonoBehaviour
{
    //Public changable things
    public float speed = 20.0f;
    public float life = 5.0f;
    public bool canRunProgress = true;
    public bool isGrounded;
    public GameObject Explosion;
    public Transform rocket;
    public Rigidbody rb;


    // If the object is alive for more than 5 seconds it dissapears.
    void Start()
    {
        Invoke("Kill", life);
    }
    // Update is called once per frame
    void Update()
    {
        //if the object isn't tounching the ground and is able to run it's process
        if (isGrounded == false && canRunProgress)
        {
            transform.position += transform.forward * speed * Time.deltaTime;
            canRunProgress = true;
        }
        //if the object IS touching the ground it then makes the above process unable to work and then begins the kill routine
        else if(isGrounded == true)
        {
            canRunProgress = false;
            StartCoroutine(Kill());
        }
        //detects if tounching ground
        void OnCollisionEnter(Collision other)
        {
            if (other.gameObject.tag == "Ground")
            {
                isGrounded = true;
            }
        }
        //detects if tounching ground
        void OnCollisionExit(Collision other)
        {
            if (other.gameObject.tag == "Ground")
            {
                isGrounded = false;
            }
        }
        //kill routine - explosion is summoned and explodes 2 seconds later it then destroys the rocket.
        IEnumerator Kill()
        {
            GameObject go = (GameObject)Instantiate(Explosion, transform); // also this needs to have the explosion be summoned in the middel of the rocket.
            yield return new WaitForSeconds(2f);
            Destroy(gameObject);
        }
    }
}