import pgzrun

TITLE = "Paf l'oiseau"
WIDTH = 400
HEIGHT = 708

def draw():
    screen.blit('cascade', (0, 0))
    
titi = Actor('bird1', (75, 350))

def draw():
    screen.blit('background', (0, 0))
    titi.draw()

def on_mouse_down():
    titi.speed += 1

def update():
    titi.x += titi.speed
    if titi.left > WIDTH :
        titi.right = 0


titi.speed = 3

pgzrun.go()