diff --git a/birdie.py b/birdie.py
index 9d6e7da..fc6fb93 100644
--- a/birdie.py
+++ b/birdie.py
@@ -6,10 +6,10 @@ HEIGHT = 708
 
 def on_mouse_down():
     print('Clic souris !')
-    titi.y -= 50 # équivalent à titi.y = titi.y - 50
+    titi.x -= 50 # équivalent à titi.y = titi.y - 50
 
 def update():
-    titi.y += titi.speed
+    titi.x += titi.speed
    
 def draw():
     screen.blit('background', (0, 0))