2dshooter rotation phan5

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

public class effectrotate : MonoBehaviour {


    // Update is called once per frame
    void Update () {
        Vector3 difference = Input.mousePosition - Camera.main.WorldToScreenPoint(transform.position);
        difference.Normalize();

        float rotZ = Mathf.Atan2(difference.y, difference.x) * Mathf.Rad2Deg;
        this.transform.rotation = Quaternion.Euler(0f, 0f, rotZ);
    }
}