Snake Game | Simple Snake Game written in Python using the PyGame Library.

Snake Game | Simple Snake Game written in Python using the PyGame Library. Vast Coding 

Here is the Source Code:-

"""

Snake Eater

Made with PyGame

"""

import pygame, sys, time, random

# Difficulty settings

# Easy      ->  10

# Medium    ->  25

# Hard      ->  40

# Harder    ->  60

# Impossible->  120

difficulty = 25

# Window size

frame_size_x = 720

frame_size_y = 480

# Checks for errors encountered

check_errors = pygame.init()

# pygame.init() example output -> (6, 0)

# second number in tuple gives number of errors

if check_errors[1] > 0:

    print(f'[!] Had {check_errors[1]} errors when initialising game, exiting...')

    sys.exit(-1)

else:

    print('[+] Game successfully initialised')

# Initialise game window

pygame.display.set_caption('Snake Eater')

game_window = pygame.display.set_mode((frame_size_x, frame_size_y))

# Colors (R, G, B)

black = pygame.Color(0, 0, 0)

white = pygame.Color(255, 255, 255)

red = pygame.Color(255, 0, 0)

green = pygame.Color(0, 255, 0)

blue = pygame.Color(0, 0, 255)

# FPS (frames per second) controller

fps_controller = pygame.time.Clock()

# Game variables

snake_pos = [100, 50]

snake_body = [[100, 50], [100-10, 50], [100-(2*10), 50]]

food_pos = [random.randrange(1, (frame_size_x//10)) * 10, random.randrange(1, (frame_size_y//10)) * 10]

food_spawn = True

direction = 'RIGHT'

change_to = direction

score = 0

# Game Over

def game_over():

    my_font = pygame.font.SysFont('times new roman', 90)

    game_over_surface = my_font.render('YOU DIED', True, red)

    game_over_rect = game_over_surface.get_rect()

    game_over_rect.midtop = (frame_size_x/2, frame_size_y/4)

    game_window.fill(black)

    game_window.blit(game_over_surface, game_over_rect)

    show_score(0, red, 'times', 20)

    pygame.display.flip()

    time.sleep(3)

    pygame.quit()

    sys.exit()

# Score

def show_score(choice, color, font, size):

    score_font = pygame.font.SysFont(font, size)

    score_surface = score_font.render('Score : ' + str(score), True, color)

    score_rect = score_surface.get_rect()

    if choice == 1:

        score_rect.midtop = (frame_size_x/10, 15)

    else:

        score_rect.midtop = (frame_size_x/2, frame_size_y/1.25)

    game_window.blit(score_surface, score_rect)

    # pygame.display.flip()

# Main logic

while True:

    for event in pygame.event.get():

        if event.type == pygame.QUIT:

            pygame.quit()

            sys.exit()

        # Whenever a key is pressed down

        elif event.type == pygame.KEYDOWN:

            # W -> Up; S -> Down; A -> Left; D -> Right

            if event.key == pygame.K_UP or event.key == ord('w'):

                change_to = 'UP'

            if event.key == pygame.K_DOWN or event.key == ord('s'):

                change_to = 'DOWN'

            if event.key == pygame.K_LEFT or event.key == ord('a'):

                change_to = 'LEFT'

            if event.key == pygame.K_RIGHT or event.key == ord('d'):

                change_to = 'RIGHT'

            # Esc -> Create event to quit the game

            if event.key == pygame.K_ESCAPE:

                pygame.event.post(pygame.event.Event(pygame.QUIT))

    # Making sure the snake cannot move in the opposite direction instantaneously

    if change_to == 'UP' and direction != 'DOWN':

        direction = 'UP'

    if change_to == 'DOWN' and direction != 'UP':

        direction = 'DOWN'

    if change_to == 'LEFT' and direction != 'RIGHT':

        direction = 'LEFT'

    if change_to == 'RIGHT' and direction != 'LEFT':

        direction = 'RIGHT'

    # Moving the snake

    if direction == 'UP':

        snake_pos[1] -= 10

    if direction == 'DOWN':

        snake_pos[1] += 10

    if direction == 'LEFT':

        snake_pos[0] -= 10

    if direction == 'RIGHT':

        snake_pos[0] += 10

    # Snake body growing mechanism

    snake_body.insert(0, list(snake_pos))

    if snake_pos[0] == food_pos[0] and snake_pos[1] == food_pos[1]:

        score += 1

        food_spawn = False

    else:

        snake_body.pop()

    # Spawning food on the screen

    if not food_spawn:

        food_pos = [random.randrange(1, (frame_size_x//10)) * 10, random.randrange(1, (frame_size_y//10)) * 10]

    food_spawn = True

    # GFX

    game_window.fill(black)

    for pos in snake_body:

        # Snake body

        # .draw.rect(play_surface, color, xy-coordinate)

        # xy-coordinate -> .Rect(x, y, size_x, size_y)

        pygame.draw.rect(game_window, green, pygame.Rect(pos[0], pos[1], 10, 10))

    # Snake food

    pygame.draw.rect(game_window, white, pygame.Rect(food_pos[0], food_pos[1], 10, 10))

    # Game Over conditions

    # Getting out of bounds

    if snake_pos[0] < 0 or snake_pos[0] > frame_size_x-10:

        game_over()

    if snake_pos[1] < 0 or snake_pos[1] > frame_size_y-10:

        game_over()

    # Touching the snake body

    for block in snake_body[1:]:

        if snake_pos[0] == block[0] and snake_pos[1] == block[1]:

            game_over()

    show_score(1, white, 'consolas', 20)

    # Refresh game screen

    pygame.display.update()

    # Refresh rate

    fps_controller.tick(difficulty)

Output:-

Output

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