Enemy.cs

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

public class Enemy : MonoBehaviour
{
    //Used this script for most of the enemies, all the basics really. animation, health and UI health bar which was commented out in Enemy2

    public Animator animator;
    public float maxHealth = 75; //health
    public float currentHealth;

    public GameObject healthBarUI;
    public Slider slider;
    public GameObject enemie;
    public Transform ghost;

    public int Shurikendamage = 10;

    public GameObject score; //shuriken



    void Start()
    {
        currentHealth = maxHealth;
        slider.value = CalculateHealth();
        ghost.position = new Vector3(ghost.position.x, ghost.position.y, ghost.position.z);

    }

    void Update()
    {
        slider.value = CalculateHealth();

        if(currentHealth < maxHealth)
        {
            healthBarUI.SetActive(true);
        }

        

    }

    public void TakeDamage(int damage)
    {
        healthBarUI.SetActive(true);

        currentHealth -= damage;
        slider.value = CalculateHealth();

        //Hurt Animation
        SoundManagerScript.PlaySound("GhostHurt");
        animator.SetTrigger("Hurt");
        if (currentHealth <= 0)
        {
            Instantiate(score, new Vector3(ghost.position.x, ghost.position.y, ghost.position.z), Quaternion.identity);

            animator.SetBool("IsDead", true);
            Die();
        }
    }

    void Die()
    {
        enemie.SetActive(false);
      
    }

    private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.gameObject.CompareTag("Bullet"))
        {
            other.gameObject.SetActive(false);
            TakeDamage(Shurikendamage);
            healthBarUI.SetActive(true);
            slider.value = CalculateHealth();
            SoundManagerScript.PlaySound("GhostHurt");
        }

    }

    float CalculateHealth()
    {
        return currentHealth / maxHealth;
    }
}