Galaga.py

import random 
import pgzrun

WIDTH = 1200
HEIGHT = 600

WHITE = (255, 255, 255)
BLUE = (0, 0, 255)

ship = Actor("galaga")
bug = Actor("bug")

ship.pos = (WIDTH//2, HEIGHT-60)
speed = 5

game_over = False

#defining the list of bullets and enemies
bullets = []
enemies = []

score = 0
direction = 1
ship.countdown = 90

for x in range (8):
    for y in range (4):
        enemies.append(Actor("bug"))
        enemies[-1].x = 100 + 50 * x
        enemies[-1].y = 80 + 50 * y

def display_score():
    screen.draw.text(str(score), (50, 30))

def on_key_down(key):
    if key == keys.SPACE:
        bullets.append(Actor("bullet"))
        bullets[-1].x = ship.x
        bullets[-1].y = ship.y - 50

def update():
    global score, game_over, direction
    moveDown = False
    if keyboard.left:
        ship.x -= speed
        if ship.x <= 0:
            ship.x = 0
    elif keyboard.right:
        ship.x += speed
        if ship.x >= WIDTH:
            ship.x = WIDTH

    for bullet in bullets:
        if bullet.y <= 0:
            bullets.remove(bullet)

        else:
            bullet.y -= 10

    if len(enemies) > 0 and (enemies[-1].x > WIDTH-80 or enemies[0].x < 80):
        moveDown = True
        direction = direction * -1

    for enemy in enemies:
        enemy.x += 4*direction
        if moveDown == True:
            enemy.y += 100

        if enemy.y > HEIGHT:
            enemies.remove(enemy)
    
        if enemy.colliderect(ship):
            for enemy in enemies:
                enemies.remove(enemy)

        if enemy.y >= HEIGHT:
            enemy.y = -100
            enemy.x = random.randint(50, WIDTH-50)

        for bullet in bullets:
            if enemy.colliderect(bullet):
                score  += 100
                enemies.remove(enemy)
                bullets.remove(bullet)
                if len(enemies) == 0:
                    handle_game_over()

def draw():
    global score
    screen.clear()
    screen.fill(BLUE)
    for bullet in bullets:
        bullet.draw()
    for enemy in enemies:
        enemy.draw()
    ship.draw()

    if game_over:
        screen.fill("black")
        screen.draw.text("Game Over", (500, 300), fontsize = 60)
        screen.draw.text("Final Score: {}".format(score), (550, 350), fontsize = 30)

    if game_over == False:
        display_score()

def handle_game_over():
    global game_over
    game_over = True

pgzrun.go()

SC