Создавал игру , появилась ошибка "AttributeError: 'PlatformSprite' object has no attribute 'move'"

from tkinter import *
import time
import random
 
class Game:
 def __init__(self):
  self.tk = Tk()
  self.tk.title("Человечек спешит к выходу")
  self.tk.resizable(0, 0)
  self.tk.wm_attributes("-topmost", 1)
  self.canvas = Canvas(self.tk, width=500, height=500, highlightthickness=0)
  self.canvas.pack()
  self.tk.update()
  self.canvas_height = 500
  self.canvas_width = 500
  self.bg = PhotoImage(file="background.gif")
  w = self.bg.width()
  h = self.bg.height()
  for x in range(0, 5):
   for y in range(0, 5):
    self.canvas.create_image(x * w, y * h, image=self.bg, anchor='nw')
  self.sprites = []
  self.running = True
 
 def mainloop(self):
   while 1:
     if self.running == True:
      for sprite in self.sprites:
        sprite.move()
     self.tk.update_idletasks()
     self.tk.update()
     time.sleep(0.01)
class Coords:
 def __init__(self, x1=0, y1=0, x2=0, y2=0):
   self.x1 = x1
   self.y1 = y1
   self.x2 = x2
   self.y2 = y2
def within_x(co1, co2):
 if (co1.x1 > co2.x1 and co1.x1 < co2.x2) or (co1.x2 > co2.x1 and co1.x2 < co2.x2)  or (co2.x1 > co1.x1 and co2.x1 < co1.x2) or (co2.x2 > co1.x1 and co2.x2 < co1.x2):
  return True
 else:
  return False
def within_y(co1, co2):
 if (co1.y1 > co2.y1 and co1.y1 < co2.y2) or (co1.y2 > co2.y1 and co1.y2 < co2.y2) or (co2.y1 > co1.y1 and co2.y1 < co1.y2)  or (co2.y2 > co1.y1 and co2.y2 < co1.y2):
  return True
 else:
  return False
def collided_left(co1, co2):
 if within_y(co1, co2):
  if co1.x1 <= co2.x2 and co1.x1 >= co2.x1:
   return True
  return False
 
def collided_right(co1, co2):
 if within_y(co1, co2):
  if co1.x2 >= co2.x1 and co1.x2 <= co2.x2:
   return True
  return False
 
def collided_top(co1, co2):
  if within_x(co1, co2):
   if co1.y1 <= co2.y2 and co1.y1 >= co2.y1:
    return True
  return False
 
def collided_bottom(y, co1, co2):
  if within_x(co1, co2):
   y_calc = co1.y2 + y
   if y_calc >= co2.y1 and y_calc <= co2.y2:
     return True
   return False
 
class Sprite:
 def __init__(self, game):
 
  self.game = game
  self.endgame = False
  self.coordinates = None
 
  def move(self):
   pass
 
  def coords(self):
   return self.coordinates
 
class PlatformSprite(Sprite):
 def __init__(self, game, photo_image, x, y, width, height):
  Sprite.__init__(self, game)
  self.photo_image = photo_image
  self.image = game.canvas.create_image(x, y,image = self.photo_image, anchor = 'nw')
  self.coordinates = Coords(x, y, x + width, y + height)
 
class StickFigureSprite(Sprite):
 def __init__(self, game):
  Sprite.__init__(self, game)
  self.images_left = [PhotoImage(file="figure-L1.gif"), PhotoImage(file="figure-L2.gif"),PhotoImage(file="figure-L3.gif")]
  self.images_right = [PhotoImage(file="figure-R1.gif"), PhotoImage(file="figure-R2.gif"), PhotoImage(file="figure-R3.gif")]
  self.image = game.canvas.create_image(200, 470, image=self.images_left[0], anchor='nw')
  self.x = -2
  self.y = 0
  self.current_image = 0
  self.current_image_add = 1
  self.jump_count = 0
  self.last_time = time.time()
  self.coordinates = Coords()
  game.canvas.bind_all('<KeyPress-Left>', self.turn_left)
  game.canvas.bind_all('<KeyPress-Right>', self.turn_right)
  game.canvas.bind_all('<space>', self.jump)
 def turn_left(self, evt):
  if self.y == 0:
   self.x = -2
 def turn_right(self, evt):
  if self.y == 0:
   self.x = 2
 def jump(self, evt):
  if self.y == 0:
   self.y = -4
   self.jump_count = 0
 def animate(self):
  if self.x != 0 and self.y == 0:
   if time.time() - self.last_time > 0.1:
    self.last_time = time.time()
    self.current_image += self.current_image_add
    if self.current_image >= 2:
     self.current_image_add = -1
    if self.current_image <= 0:
      self.current_image_add = 1
  if self.x < 0:
    if self.y != 0:
     self.game.canvas.itemconfig(self.image, image=self.images_left[2])
    else:
     self.game.canvas.itemconfig(self.image,image=self.images_left[self.current_image])
  elif self.x > 0:
    if self.y != 0:
      self.game.canvas.itemconfig(self.image,image=self.images_right[2])
    else:
     self.game.canvas.itemconfig(self.image,image=self.images_right[self.current_image])
 def coords(self):
  xy = self.game.canvas.coords(self.image)
  self.coordinates.x1 = xy[0]
  self.coordinates.y1 = xy[1]
  self.coordinates.x2 = xy[0] + 27
  self.coordinates.y2 = xy[1] + 30
  return self.coordinates
 
 def move(self):
  self.animate()
  if self.y < 0:
   self.jump_count += 1
   if self.jump_count > 20:
    self.y = 4
  if self.y > 0:
   self.jump_count -= 1
  co = self.coords()
  left = True
  right = True
  top = True
  bottom = True
  falling = True
  if self.y > 0 and co.y2 >= self.game.canvas_height:
   self.y = 0
   bottom = False
  elif self.y < 0 and co.y1 <= 0:
   self.y = 0
   top = False
  if self.x > 0 and co.x2 >= self.game.canvas_width:
   self.x = 0
   right = False
  elif self.x < 0 and co.x1 <= 0:
   self.x = 0
   left = False
  for sprite in self.game.sprites:
   if sprite == self:
    continue
   sprite_co = sprite.coords()
   if top and self.y < 0 and collided_top(co, sprite_co):
    self.y = -self.y
    top = False
   if bottom and self.y > 0 and collided_bottom(self.y, co, sprite_co):
    self.y = sprite_co.y1 - co.y2
    if self.y < 0:
     self.y = 0
     bottom = False
     top = False
   if bottom and falling and self.y == 0  and co.y2 < self.game.canvas_height  and collided_bottom(1, co, sprite_co):
    falling = False
   if left and self.x < 0 and collided_left(co, sprite_co):
    self.x = 0
    left = False
    if sprite.endgame:
     self.game.running = False
   if right and self.x > 0 and collided_right(co, sprite_co):
    self.x = 0
    right = False
    if sprite.endgame:
     self.game.running = False
   if falling and bottom and self.y == 0  and co.y2 < self.game.canvas_height:
    self.y = 4
   self.game.canvas.move(self.image, self.x, self.y)
 
class DoorSprite(Sprite):
 def __init__(self, game, photo_image, x, y, width, height):
  Sprite.__init__(self, game)
  self.photo_image = photo_image
  self.image = game.canvas.create_image(x, y,   image = self.photo_image, anchor = 'nw')
  self.coordinates = Coords( x, y, x + (width / 2), y + height)
  self.endgame = True
g = Game()
platform1 = PlatformSprite(g, PhotoImage(file="platform1.gif"),0, 480, 100, 10)
platform2 = PlatformSprite(g,PhotoImage(file="platform1.gif"),150, 440, 100, 10)
platform3 = PlatformSprite(g, PhotoImage(file="platform1.gif"),300, 400, 100, 10)
platform4 = PlatformSprite(g, PhotoImage(file="platform1.gif"),300, 160, 100, 10)
platform5 = PlatformSprite(g, PhotoImage(file="platform2.gif"), 175, 350, 66, 10)
platform6 = PlatformSprite(g, PhotoImage( file="platform2.gif"),50, 300, 66, 10)
platform7 = PlatformSprite(g, PhotoImage(file="platform2.gif"),170, 120, 66, 10)
platform8 = PlatformSprite(g, PhotoImage(file="platform2.gif"),45, 60, 66, 10)
platform9 = PlatformSprite(g, PhotoImage( file="platform3.gif"),170, 250, 32, 10)
platform10 = PlatformSprite(g, PhotoImage(file="platform3.gif"), 230, 200, 32, 10)
g.sprites.append(platform1)
g.sprites.append(platform2)
g.sprites.append(platform3)
g.sprites.append(platform4)
g.sprites.append(platform5)
g.sprites.append(platform6)
g.sprites.append(platform7)
g.sprites.append(platform8)
g.sprites.append(platform9)
g.sprites.append(platform10)
door = DoorSprite(g,PhotoImage(file="door1.gif"), 45, 30, 40, 35)
g.sprites.append(door)
sf = StickFigureSprite(g)
g.sprites.append(sf)
g.mainloop()

for sprite in self.sprites:
        print(dir(sprite))
        sprite.move()