Problème avec pygame

Bonjour,

Je programme actuellement un jeu python pour apprendre, et j'ai un problème assez embêtant.
J'ai créer une classe Monster et je lui ai defini une image or cette derniere ne veux pas s'afficher et lors du lancement du programme, l'erreur affiché est :
"AttributeError: 'Monster' object has no attribute 'image' "

Dans mon programme il y à aussi des projectiles qui utilise la même façon d'apparaitre et eux marchent correctement.
J'ai passé 3h à chercher mais rien alors je demande de l'aide ici.

from tkinter import *
import pygame
from subprocess import call
pygame.init()

class game:

def __init__(self):
self.player = player()
self.all_monsters = pygame.sprite.Group()
self.pressed = {}
self.spawn_monster()


def spawn_monster(self):
monster = Monster()
self.all_monsters.add(monster)



class player(pygame.sprite.Sprite):

def __init__(self):
self.health = 100
self.max_health = 100
self.attack = 20
self.all_projectiles = pygame.sprite.Group()
self.image = pygame.image.load("Main.png")
self.rect = self.image.get_rect()
self.rect.x =0
self.rect.y =0

def launch_projectile(self):

self.all_projectiles.add(Projectile(self))


def right(self):
self.rect.x += x_vit

def left(self):
self.rect.x -= x_vit

def up(self):
self.rect.y -= y_vit

def down(self):
self.rect.y += y_vit


def invisible_wall():
if game.player.rect.x>170:
game.player.rect.x = 169
if game.player.rect.x <-30:
game.player.rect.x = -29
if game.player.rect.y<-10:
game.player.rect.y = -9
if game.player.rect.y > 560:
game.player.rect.y = 559


class Projectile(pygame.sprite.Sprite):
def __init__(self, player):
super().__init__()
self.velocity = 15
self.player = player
self.image = pygame.image.load('fireball.png')
self.rect = self.image.get_rect()
self.rect.x = player.rect.x + 135
self.rect.y = player.rect.y + 70

def remove(self):
self.player.all_projectiles.remove(self)

def move(self):
self.rect.x += self.velocity

if self.rect.x > 1080:
self.remove()




class Monster(pygame.sprite.Sprite):
def __init___(self, game):
super().__init__
self.health = 100
self.max_health = 100
self.attack = 5
self.image = pygame.image.load("Monster.png")
self.rect = self.image.get_rect()
self.rect.x = 10
self.rect.y = 10





screen = pygame.display.set_mode((1080,720))
pygame.display.set_caption("Test")
background = pygame.image.load("background.jpg")
game = game()
clock = pygame.time.Clock()


running = True


x_vit=10
y_vit=10

while running:

screen.blit(background, (0, 0))

screen.blit(game.player.image, game.player.rect)

for projectile in game.player.all_projectiles:
projectile.move()


game.player.all_projectiles.draw(screen)


game.all_monsters.draw(screen)

if game.pressed.get(pygame.K_RIGHT):
game.player.right()
if game.pressed.get(pygame.K_LEFT):
game.player.left()
if game.pressed.get(pygame.K_UP):
game.player.up()
if game.pressed.get(pygame.K_DOWN):
game.player.down()



invisible_wall()

pygame.display.flip()

for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
pygame.quit()

elif event.type == pygame.KEYDOWN:
game.pressed[event.key] = True


if event.key == pygame.K_SPACE:
game.player.launch_projectile()

elif event.type == pygame.KEYUP:
game.pressed[event.key] = False