Run your code, then check each checkpoint before moving on.

1. 1. Move snake with arrow keys.

   Not checked
   Tip: keyboard movement pattern

   Example pattern (not the full solution):

   keys = pygame.key.get_pressed()
   if keys[pygame.K_LEFT]:
       player.x -= speed
   if keys[pygame.K_RIGHT]:
       player.x += speed

2. 2. Spawn food and grow when eaten.

   Not checked
   Tip: timed spawn pattern

   Example pattern (not the full solution):

   spawn_timer += 1
   if spawn_timer >= 30:
       spawn_timer = 0
       objects.append(make_object(random.randint(0, W - 20)))

3. 3. Lose on wall or self collision.

   Not checked
   Tip: collision check pattern

   Example pattern (not the full solution):

   for obstacle in obstacles:
       if player.colliderect(obstacle):
           game_over = True

4. 4. Restart with R.

   Not checked
   Tip: restart flow pattern

   Example pattern (not the full solution):

   if event.type == pygame.KEYDOWN and event.key == pygame.K_r:
       # Reset key game state values
       score = 0
       game_over = False