(c#)enemyHealth + playerAttack

Hello. I don`t understand what is wrong in this script, need a help.

I have 2 scripts: PlayerAttack & EnemyHealth. When I playing the scene, healthBar is immediately goes to zero, but I want that it decrease by 10.

public class EnemyHealth : MonoBehaviour { public int currentHealth = 100; public int maxHealth = 100;

 public float healthBarLength;

 // Use this for initialization
 void Start () 
 {
     AdjustHealth(currentHealth);

     healthBarLength = Screen.width / 2;

     currentHealth = maxHealth;
 }
 
 // Update is called once per frame
 void Update () 
 {
     // AdjustHealth(currentHealth);
     AdjustHealth(0);

     if(currentHealth == 0)
     {
         Death();
     }
 }

 void OnGUI()
 {
     GUI.Box(new Rect(10, 10, healthBarLength, 20), currentHealth + "/" + maxHealth); 
 }

 public void AdjustHealth(int adj)
 {
     currentHealth += adj;

     if(currentHealth < 0)
     {
         currentHealth = 0;
     }
     if(currentHealth > maxHealth)
     {
         currentHealth = maxHealth;
     }
     if(maxHealth < 1)
     {
         maxHealth = 1;
     }

     healthBarLength = (Screen.width / 2) * (currentHealth / maxHealth);     //возможно сделать перевести maxHealth во float
 }

 void Death()
 {
     Debug.Log("Enemy Die!!!");
 }

}

public class PlayerAttack : MonoBehaviour { public GameObject target;

 // Use this for initialization
 void Start () 
 {
     EnemyHealth enemyHealth = target.GetComponent<EnemyHealth>();
 }
 
 // Update is called once per frame
 void Update () 
 {
     if(Input.GetMouseButtonUp(0))
     {
         Attack();

     }
 }

 void Attack()
 {
     float distance = Vector3.Distance(target.transform.position, transform.position);
     Vector3 dir = (target.transform.position - transform.position).normalized;
     float direction = Vector3.Dot(dir, transform.forward);

     Debug.Log(direction);
     // Debug.Log(distance);

     if(distance <= 2.5 && direction > 0.3)
     {
         EnemyHealth enemyHealth = target.GetComponent<EnemyHealth>();
         enemyHealth.AdjustHealth(-10);

     }
 }

}