צלילים ומקשים לחוצים

import pygame

pygame.init()
screen = pygame.display.set_mode((480, 360))
pygame.display.set_caption("Lasers")
clock = pygame.time.Clock()

laser_sound = pygame.mixer.Sound("assets/sounds/laser.ogg")
laser_sound.set_volume(0.5)

ship = pygame.Rect(220, 300, 40, 30)
lasers = []
cooldown = 0

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        ship.x -= 5
    if keys[pygame.K_RIGHT]:
        ship.x += 5
    ship.clamp_ip(screen.get_rect())

    if cooldown > 0:
        cooldown -= 1
    if keys[pygame.K_SPACE]:
        laser_sound.play()
        if cooldown == 0:
            lasers.append(pygame.Rect(ship.centerx - 2, ship.top - 12, 4, 12))
            cooldown = 12

    for laser in lasers:
        laser.y -= 8
    lasers = [laser for laser in lasers if laser.bottom > 0]

    screen.fill((30, 30, 46))
    for laser in lasers:
        pygame.draw.rect(screen, (255, 230, 90), laser)
    pygame.draw.rect(screen, (80, 200, 230), ship)
    pygame.display.flip()
    clock.tick(60)

pygame.quit()