Raycast2D doesn't seem to work correctly.

Hello,

I'm trying to make a simple top-down game with guns, but the script used to shoot the gun does not seem to be working. The following code block is part of a script that is attached to the player. This method is called every time the player presses the mouse:

 void PistolShot()
     {
         Vector2 origin = transform.position;
         Vector2 end = mainCamera.ScreenToWorldPoint(Input.mousePosition);
         Vector2 direction = (end - origin).normalized;
         int Layer = LayerMask.GetMask("Shootable");
         RaycastHit2D hit = Physics2D.Raycast(origin, direction);
         if( hit.collider.IsTouchingLayers(Layer))
         {
             GameObject targetObject = hit.transform.gameObject;
             Enemy target = targetObject.GetComponent<Enemy>();
             if (target != null)
             {
                 target.TakeDamage(10);
             }
         }
     }

Also, the enemy script looks like this:

 public class Enemy : MonoBehaviour {
 
     public int health;
 
     void Start()
     {
         health = 50;
     }
 
     public void TakeDamage(int damage)
     {
         health -= damage;
         if(health <= 0)
         {
             Destroy(this.gameObject);
         }
     }
 }

The problem is that when I click to use the gun, either the raycast doesn't hit the enemy's collider, or it doesn't seem to be calling the TakeDamage method on the enemy. Either way, when I try to shoot at the enemy, it doesn't make the health any lower. When I use Debug.DrawLine(origin, end), the line drawn seems to go right through the enemy, but I don't think the ray is being cast correctly.

Any help would be greatly appreciated!