How do you make a projectrile go the direction the player is facing?

I am very new to Unity and I am making my first game. I want it so that when I click 'k' a fireball is shot in the direction the player is facing. What happens is that the fire will always move right. The Debug.DrawLine works properly. Can someone please help me out.

Script that moves the fire using UnityEngine; using UnityStandardAssets._2D;

 public class MoveTrail : MonoBehaviour {
 
     public int moveSpeed = 150;
     public GameObject player;
 
     // Update is called once per frame
     void Update () {
         if (player.GetComponent<PlatformerCharacter2D>().m_FacingRight == true)
         {
             transform.Translate(Vector3.right * Time.deltaTime * moveSpeed);
             Destroy(gameObject, 1);
         }
         else
         {
             transform.Translate(Vector3.left * Time.deltaTime * moveSpeed);
             Destroy(gameObject, 1);
         }
     }
 }

Shooting script using UnityEngine;

 public class shoot : MonoBehaviour {
 
     public float Damage = 10;
     public LayerMask whatToHit;
 
     public Transform BulletTrailPrefab;
 
     Transform firePoint;
     Transform hitPoint;
 
     // Use this for initialization
     void Awake()
     {
         firePoint = transform.Find("FirePoint");
         if (firePoint == null)
         {
             Debug.LogError("Boi there be no firepoint");
         }
         hitPoint = transform.Find("HitPoint");
         if (hitPoint == null)
         {
             Debug.LogError("Boi there be no hitpoint");
         }
     }
     
     // Update is called once per frame
     void Update ()
     {
         if (Input.GetButtonDown("Fire1"))
         {
             Shoot();
         }
     }
 
     void Shoot()
     {
         Vector2 firePointPosition = new Vector2(firePoint.position.x, firePoint.position.y);
         Vector2 hitPointPosition = new Vector2(hitPoint.position.x, hitPoint.position.y);
         RaycastHit2D hit = Physics2D.Raycast(firePointPosition, hitPointPosition - firePointPosition, 100, whatToHit);
         Effect();
         Debug.DrawLine(firePointPosition, (hitPointPosition - firePointPosition) * 100, Color.magenta);
         if (hit.collider != null)
         {
             Debug.DrawLine(firePointPosition, hit.point, Color.red);
         }
     }
 
     void Effect()
     {
         Instantiate(BulletTrailPrefab, firePoint.position, firePoint.rotation);
     }
 }