main.py

import pygame
from pygame.locals import (
    RLEACCEL,
    K_UP,
    K_DOWN,
    K_RIGHT,
    K_LEFT,
    K_ESCAPE,
    KEYDOWN,
    QUIT
)
import random

# Define constants for the screen width and height
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600

class Player(pygame.sprite.Sprite):
    def __init__(self):
        super(Player, self).__init__()
        self.surf = pygame.image.load('jet.png').convert()
        self.surf.set_colorkey((255,255,255), RLEACCEL)
        self.rect = self.surf.get_rect()

    def update(self, pressed_keys):
        if pressed_keys[K_UP]:
            self.rect.move_ip(0, -5)
            move_up_sound.play()

        if pressed_keys[K_DOWN]:
            self.rect.move_ip(0, 5)
            move_down_sound.play()

        if pressed_keys[K_LEFT]:
            self.rect.move_ip(-5, 0)

        if pressed_keys[K_RIGHT]:
            self.rect.move_ip(5, 0)

        if self.rect.left < 0:
            self.rect.left = 0

        if self.rect.right > SCREEN_WIDTH:
            self.rect.right = SCREEN_WIDTH

        if self.rect.top <= 0:
            self.rect.top = 0
        
        if self.rect.bottom >= SCREEN_HEIGHT:
            self.rect.bottom = SCREEN_HEIGHT

class Enemy(pygame.sprite.Sprite):
    def __init__(self):
        super(Enemy, self).__init__()
        self.surf = pygame.image.load('missile.png').convert()
        self.surf.set_colorkey((255,255,255), RLEACCEL)
        self.rect = self.surf.get_rect(
            center=(
                random.randint(SCREEN_WIDTH + 20, SCREEN_WIDTH + 100),
                random.randint(0, SCREEN_HEIGHT),
            )
        )
        self.speed = random.randint(5, 20)

    def update(self):
        self.rect.move_ip(-self.speed, 0)
        if self.rect.right < 0:
            self.kill()

class Cloud(pygame.sprite.Sprite):
    def __init__(self):
        super(Cloud, self).__init__()
        self.surf = pygame.image.load('cloud.png').convert()
        self.surf.set_colorkey((0,0,0), RLEACCEL)
        self.rect = self.surf.get_rect(
            center=(
                random.randint(SCREEN_WIDTH + 20, SCREEN_WIDTH + 100),
                random.randint(0, SCREEN_HEIGHT)
            )
        )

    def update(self):
        self.rect.move_ip(-5, 0)
        if self.rect.right < 0:
            self.kill()

pygame.mixer.init()
pygame.init()

# Create the screen object
# The size is determined by the constant SCREEN_WIDTH and SCREEN_HEIGHT
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))

ADDENEMY = pygame.USEREVENT + 1
pygame.time.set_timer(ADDENEMY, 250)

ADDCLOUD = pygame.USEREVENT + 2
pygame.time.set_timer(ADDCLOUD, 1000)

player = Player()

enemies = pygame.sprite.Group()
clouds = pygame.sprite.Group()
all_sprites = pygame.sprite.Group()
all_sprites.add(player)

clock = pygame.time.Clock()

pygame.mixer.music.load('Apoxode_-_Electric_1.mp3')
pygame.mixer.music.play(loops=-1)

move_up_sound = pygame.mixer.Sound("Rising_putter.ogg")
move_down_sound = pygame.mixer.Sound("Falling_putter.ogg")
collision_sound = pygame.mixer.Sound("Collision.ogg")

running = True

while running:

    for event in pygame.event.get():
        if event.type == KEYDOWN:
            if event.key == K_ESCAPE:
                running = False

        elif event.type == pygame.QUIT:
            running = False

        elif event.type == ADDENEMY:
            new_enemy = Enemy()
            enemies.add(new_enemy)
            all_sprites.add(new_enemy)
        
        elif event.type == ADDCLOUD:
            new_cloud = Cloud()
            clouds.add(new_cloud)
            all_sprites.add(new_cloud)

    pressed_keys = pygame.key.get_pressed()

    player.update(pressed_keys)

    enemies.update()
    clouds.update()

    screen.fill((135,206,250))

    for entity in all_sprites:
        screen.blit(entity.surf, entity.rect)

    if pygame.sprite.spritecollideany(player, enemies):
        player.kill()
        move_up_sound.stop()
        move_down_sound.stop()
        collision_sound.play()
        running = False

    screen.blit(player.surf, player.rect)

    pygame.display.flip()
    clock.tick(30)