EnemyHealthManager.cs

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

public class EnemyHealthManager : MonoBehaviour
{

    public int enemyHealth; // How much health the enemy has

    public GameObject deathPartical;// Effect when enemy dies
    public int pointsForKillingEnemy; // Points to add when the enemy is killed

    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {

        if (enemyHealth <= 0)
        {
            Instantiate(deathPartical, transform.position, transform.rotation); // Spawn the death effect
            ScoreManager.AddPoints(pointsForKillingEnemy); // Add points to score

            Destroy(gameObject); // Destroy the enemy
        }
    }

    public void giveDamage(int damageToGive)
    {
        enemyHealth -= damageToGive;
        GetComponent<AudioSource>().Play();
    }
}