solution

birdie.py

@@ -1 +1,30 @@
-print('Hello world !')
+import pgzrun
+
+TITLE = "Paf l'oiseau"
+WIDTH = 400
+HEIGHT = 708
+
+def on_mouse_down():
+    print('Clic souris !')
+    titi.y = titi.y - 50
+    print (titi.x)
+
+def update():
+    titi.y += 1
+
+def update():
+    titi.y += titi.speed
+
+def draw():
+    screen.blit('background', (0, 0))
+    titi.draw()
+
+titi = Actor ('bird1', (75,350))
+
+
+
+
+
+pgzrun.go()
+
+

birdie1.py

@@ -0,0 +1,15 @@
+import pgzrun
+
+TITLE = "Paf l'oiseau"
+WIDTH = 400
+HEIGHT = 708
+
+def draw():
+    screen.blit('cascade', (0, 0))
+
+
+
+
+pgzrun.go()
+
+