DodgeTheMeteors

#set up variables for the game
stage.set_background("space")
stage.disable_all_walls()

#set up variables for the game
still_flying = True
meteors = []
aliens = []
aliens_caught = 0

#set up player (ufo) sprite
ufo = codesters.Sprite("ufo")
ufo.set_size(0.5)
ufo.go_to(200, 0)

#Insert collision code here

#set up controls for the spaceship
def up_key():
    ufo.move_up(20)
def down_key():
    ufo.move_down(20)
stage.event_key("up", up_key)
stage.event_key("down", down_key)

#create a new meteor
def create_meteor():
    global meteors
    meteor = codesters.Sprite("meteor1", -250, random.randint(-250, 250))
    meteor.set_x_speed(10)
    meteor.set_size(.5)
    meteors.append(meteor)

#create a new alien survivior
def create_alien():
    global aliens
    alien = codesters.Sprite("alien1", -250, random.randint(-250, 250))
    alien.set_x_speed(5)
    alien.set_size(.5)
    aliens.append(alien)

#main game loop
def main():
    #set up meteor and alien sprites to spawn every 2 seconds on the left side of the screen
    while still_flying is True:
        create_meteor()
        create_alien()
        stage.wait(0.25)
        for sprite in meteors:
            if sprite.get_x() > 250:
                stage.remove_sprite(sprite)
                meteors.remove(sprite)
        for sprite in aliens:
            if sprite.get_x() > 250:
                stage.remove_sprite(sprite)
                aliens.remove(sprite)

main()