Revise paste Dungeon Crawler Enemy Class

---------------------------------enemies.py---------------------------------
import pygame
import random
from message import *
from projectile import *

class Enemy(pygame.sprite.Sprite):
    def __init__(self, path, pos, level):
        super().__init__()
        self.path = path
        self.image = pygame.image.load(path)
        self.imagePath = path
        self.rect = self.image.get_rect()
        self.rect.center = pos
        self.heading = None
        self.movement = pygame.math.Vector2(0, 2)
        self.movement.rotate_ip(random.randint(0, 360))
        self.level = level
        self.health = 10
        self.attack_damage = 3
        self.defense = 1
        self.reload = 20
        self.target = None
        self.projectile_cooldown = 180  # 3 seconds at 60fps
        self.projectile_timer = random.randint(0, self.projectile_cooldown)  # staggered firing

def update(self):
        if pygame.sprite.collide_rect(self, self.level.player) and self.level.player.alive:
            self.target = self.level.player
        else:
            self.target = None
        if self.target is not None:
            self.reload -= 1
            if self.reload == 0:
                self.reload = 60
                self.attack(self.target)
            return
        self.rect.move_ip(self.movement)
        if len(pygame.sprite.spritecollide(self, self.level.walls, False)) >= 1:
            self.movement.rotate_ip(180)
            self.rect.move_ip(self.movement)
            self.movement.rotate_ip(random.randint(0, 360))
        self.projectile_timer = self.projectile_timer - 1
        if self.projectile_timer <= 0:
            self.projectile_timer = self.projectile_cooldown
            self.fire_projectiles()

def fire_projectiles(self):
        directions = [
            (0, -1),  # up
            (0, 1),   # down
            (-1, 0),  # left
            (1, 0),   # right
        ]
        for dir in directions:
            projectile = Projectile(
                pos=self.rect.center,
                direction=dir,
                speed=4,
                damage=2,
                level=self.level,
                imagepath='images/fireball.gif'
            )
            self.level.projectiles.add(projectile)

def attack(self, player):
        player.defend(self.attack_damage)

def defend(self, damage):
        if random.randint(1, 20) > self.defense:
            self.health -= damage
            if self.health <= 0:
                self.kill()
                if len(self.level.enemies) == 0 and not self.level.exit.unlocked:
                    self.level.messages.add(Message("Level Cleared,", (self.rect.centerx, self.rect.centery-30)))
                    self.level.messages.add(Message("Exit Unlocked!", self.rect.center))
                    self.level.exit.unlock()
                return True