How do I make a player shoot right and left 2D platformer firing left and right, help!

How do I make a player shoot right and left 2D platformer firing left and right, help!
Here is my script
I’m making the game for android


using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityStandardAssets.CrossPlatformInput;

public class movo : MonoBehaviour
{
float bulletSpeed = 500f;
public Animator anim;
public Transform barrel;
public Rigidbody2D bullet;
private Rigidbody2D rb;
private bool moveLeft;
private bool moveRight;
private float horizontalMove;
public float speed = 5;
public SpriteRenderer sp;

private void Start()
{
    anim = GetComponent<Animator>();
    rb = GetComponent<Rigidbody2D>();
    sp = GetComponent<SpriteRenderer>();

    moveLeft = false;
    moveRight = false;
}

public void PointerDownLeft()
{
    anim.SetBool("run", true);
    moveLeft = true;
}

public void PointerUpLeft()
{
    anim.SetBool("run", false);
    moveLeft = false;
}

public void PointerDownRight()
{
    anim.SetBool("run", true);
    moveRight = true;
}

public void PointerUpRight()
{
    anim.SetBool("run", false);
    moveRight = false;
}

void Update()
{
    MovementPlayer();
    if (CrossPlatformInputManager.GetButtonDown ("Fire1"))
		Fire ();
}

void MovementPlayer()
{
    if (moveLeft)
    {
        sp.flipX = true;
        horizontalMove = -speed;
    }

    else if (moveRight)
    {
        sp. flipX = false;
        horizontalMove = speed;
    }

    else
    {
        horizontalMove = 0;
    }
}

private void FixedUpdate()
{
    rb.velocity = new Vector2(horizontalMove, rb.velocity.y);
}

void Fire()
{
	var firedBullet = Instantiate (bullet, barrel.position, barrel.rotation);
	firedBullet.AddForce (barrel.up * bulletSpeed);
}

and this code to Bullet

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

public class DestroyInTime : MonoBehaviour
{
[SerializeField]
float destroyTime = 2f;

void Start() {
    Destroy(gameObject, destroyTime);
 
}

}

This should work perfectly, I don’t see what’s wrong with it