python pyglet KeyError hatası

from pyglet.window import key
import pyglet
import random

# Oyuncu karakteri
class Player:
    def __init__(self):
        self.image = pyglet.image.load("player.png")
        self.sprite = pyglet.sprite.Sprite(self.image, x=200, y=50)
        self.speed = 200
        self.bullet_list = []

        self.keys = dict(left=False, right=False, up=False, down=False, space=False)
        
    def on_key_press(self, symbol, modifiers):
        if symbol == key.LEFT:
            self.keys['left'] = True
        elif symbol == key.RIGHT:
            self.keys['right'] = True
        elif symbol == key.UP:
            self.keys['up'] = True
        elif symbol == key.DOWN:
            self.keys['down'] = True
        elif symbol == key.SPACE:
            self.keys['space'] = True

    def on_key_release(self, symbol, modifiers):
        if symbol == key.LEFT:
            self.keys['left'] = False
        elif symbol == key.RIGHT:
            self.keys['right'] = False
        elif symbol == key.UP:
            self.keys['up'] = False
        elif symbol == key.DOWN:
            self.keys['down'] = False
        elif symbol == key.SPACE:
            self.keys['space'] = False

    def update(self, dt, keys):
        # Oyuncu hareketleri
        if self.keys[pyglet.window.key.LEFT]:
            self.sprite.x -= self.speed * dt
        if self.keys[pyglet.window.key.RIGHT]:
            self.sprite.x += self.speed * dt
        if self.keys[pyglet.window.key.UP]:
            self.sprite.y += self.speed * dt
        if self.keys[pyglet.window.key.DOWN]:
            self.sprite.y -= self.speed * dt
        if self.keys[pyglet.window.key.SPACE]:
            self.fire()

        # Uzay aracı ekran sınırları
        if self.sprite.x < 0:
            self.sprite.x = 0
        if self.sprite.x > 380:
            self.sprite.x = 380
        if self.sprite.y < 0:
            self.sprite.y = 0
        if self.sprite.y > 280:
            self.sprite.y = 280

    def fire(self):
        bullet = Bullet(self.sprite.x + 25, self.sprite.y + 50)
        self.bullet_list.append(bullet)

# Düşman karakteri
class Enemy:
    def __init__(self):
        self.image = pyglet.image.load("enemy.png")
        x_pos = random.randint(0, 1600 - self.image.width)
        y_pos = random.randint(300, 1000)
        self.sprite = pyglet.sprite.Sprite(self.image, x=x_pos, y=y_pos)
        
    def update(self, dt):
        # Düşman hareketleri
        speed = random.randint(50, 150)
        self.sprite.y -= speed * dt

# Mermi karakteri
class Bullet:
    def __init__(self, x_pos, y_pos):
        self.image = pyglet.image.load("bullet.png")
        self.sprite = pyglet.sprite.Sprite(self.image, x=x_pos - 10, y=y_pos + 30)
        
    def update(self, dt):
        # Mermi hareketleri
        speed = 500
        self.sprite.y += speed * dt

# Pencere oluşturma ve oyun döngüsü
window = pyglet.window.Window(width=1200,height=750)

@window.event
def on_key_press(symbol, modifiers):
    player.keys = key.KeyStateHandler()
    player.keys[symbol] = True

@window.event
def on_key_release(symbol, modifiers):
    player.keys[symbol] = False


player = Player()
bullet_list = []
enemy_list = []

for i in range(20):
    enemy = Enemy()
    enemy_list.append(enemy)

keys = key.KeyStateHandler()
window.push_handlers(keys)
    
@window.event
def on_draw():
    window.clear()
    player.sprite.draw()
    for enemy in enemy_list:
        enemy.sprite.draw()
    for bullet in player.bullet_list:
        bullet.sprite.draw()

def update(dt):
    keys = pyglet.window.key.KeyStateHandler()
    window.push_handlers(keys)
    player.update(dt, player.keys)

    for enemy in enemy_list:
        enemy.update(dt)
        if enemy.sprite.y < -enemy.sprite.height:
            enemy_list.remove(enemy)

    for bullet in player.bullet_list:
        bullet.update(dt)
        if bullet.sprite.y > window.height:
            player.bullet_list.remove(bullet)

    time_elapsed = 0
    time_elapsed += dt
    if time_elapsed > 3:
        enemy = Enemy()
        enemy_list.append(enemy)
        time_elapsed = 0

pyglet.clock.schedule_interval(update, 1/60.0)
pyglet.app.run()

Oyunda karakterimi hareket ettiremiyorum KeyError alıyorum yardımcı olabilir misiniz ?