Unity

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

public class FireBall : MonoBehaviour {

    //private bool isReloaded = true;
    public Image healthBar;
    public Image healthBar2;
    public GameObject Mummy;
    public Animator anim;
    public Animator anim2;
    public Image cell;
    public Sprite key;
    public GameObject gate;
    public GameObject[] door = new GameObject[4];

    void Start(){
        healthBar = GameObject.Find("ZbBar").GetComponent<Image>();
        healthBar2 = GameObject.Find("ZbBar2").GetComponent<Image>();
        Mummy = GameObject.Find("Mummy");
        anim = Mummy.GetComponent<Animator>();
        anim2 = GameObject.Find("Boss").GetComponent<Animator>();
        cell = GameObject.Find("Item5").GetComponent<Image>();
        gate = GameObject.Find("Gate 4");
    }

    void FixedUpdate () {
        // if(isReloaded == true){
            GetComponent<Rigidbody>().velocity = GameObject.Find("Player").transform.rotation * Vector3.forward * 5f;
            //isReloaded = false;
            //StartCoroutine("Reload");
        // }
    }

    void OnTriggerEnter(Collider other){
        if(other.gameObject.name == "Mummy"){
            Destroy(gameObject);
            healthBar.fillAmount -= 0.07f;
            if(healthBar.fillAmount <= 0){
                //Destroy(Mummy);
                //Debug.Log("DEATH");
                anim.SetBool("Die", true);
                PlayerPrefs.SetString("IsDeath", "true");

            }
        }
        if(other.gameObject.name == "Boss" && other.gameObject.name != "ww_shield"){
            Destroy(gameObject);
            healthBar2.fillAmount -= 0.03f;
            if(healthBar2.fillAmount <= 0){
                //Destroy(Mummy);
                //Debug.Log("DEATH");
                cell.sprite = key;
                Color c = cell.color;
                c.a = 255f;
                cell.color = c;

                gate.SetActive(false);

                anim2.SetBool("Die", true);
                PlayerPrefs.SetString("IsDeath2", "true");
            }
        }
        else{
            Destroy(gameObject);
        }
    }
}