Basic 2D Shooting System

using UnityEngine;

public class Weapon : MonoBehaviour {

    /* Berkin AKKAYA */
    /* berkinakkaya.wixsite.com/blog */

    [Header("Weapon Specifications")]
    [SerializeField] [Range(0.0f, 10.0f)] float fireRate;
    [SerializeField] float bulletSpawnOffset;
    [SerializeField] GameObject bulletPrefab;

    //Variables used for shooting system
    bool allowFire = false;
    float nextFire = 0;

    #region Update
    void Update(){
        Shoot();
    }
    #endregion

    #region Shooting
    void CreateBullet(){
        GameObject bullet = Instantiate(bulletPrefab);
        bullet.transform.position = transform.position + transform.up * bulletSpawnOffset;
    }

    void Shoot(){
        nextFire -= fireRate * Time.deltaTime;

        if(allowFire && Input.GetMouseButton(0)){
            CreateBullet();
            allowFire = false;
            return;
        }

        if(nextFire <= 0){
            allowFire = true;
            nextFire = 1f;
        }
    }
}