diff --git a/assets/textures/background.png b/assets/textures/background.png
new file mode 100644
index 0000000..891c46f
Binary files /dev/null and b/assets/textures/background.png differ
diff --git a/launch.py b/launch.py
new file mode 100644
index 0000000..93c0910
--- /dev/null
+++ b/launch.py
@@ -0,0 +1,6 @@
+import subprocess as sp
+import os
+
+folder_path = __file__.replace("\\", "/")[:-10]
+os.chdir(folder_path)
+sp.call(f'python "{folder_path}/src/main.py"')
diff --git a/src/plugins/physics.py b/src/plugins/physics.py
index 8879d4f..86d15c9 100644
--- a/src/plugins/physics.py
+++ b/src/plugins/physics.py
@@ -60,6 +60,14 @@ class AABB:
         self.min += movement
         self.max += movement
 
+    def collide(self, other: "AABB"):
+        return (
+            self.min.x < other.max.x
+            and self.max.x > other.min.x
+            and self.min.y < other.max.y
+            and self.max.y > other.min.y
+        )
+
 
 def line_to_line(sa: Vec2, ea: Vec2, sb: Vec2, eb: Vec2):
     """
@@ -117,6 +125,8 @@ def aabb_to_aabb(moving: AABB, static: AABB, movement: Vec2):
     """
     Renvoie la collision entre deux AABB.
     """
+    if moving.collide(static):
+        return 1.0, Vec2(0, 0)
     size = (moving.max - moving.min) / 2
     static = AABB(static.min - size, static.max + size, static.entity)
     start_pos = moving.min + size
diff --git a/src/scenes/game.py b/src/scenes/game.py
index a780707..a7302fa 100644
--- a/src/scenes/game.py
+++ b/src/scenes/game.py
@@ -18,6 +18,7 @@ from plugins.render import (
     Text,
     TextSize,
 )
+from plugins.sound import Sound
 from plugins.timing import Delta, Time
 import random
 from plugins.physics import CollisionHandler, Solid, Velocity
@@ -25,6 +26,12 @@ from plugins.physics import CollisionHandler, Solid, Velocity
 from scenes import game_over
 
 
+class RestrictToScene:
+    """
+    Composant marquant une entitée comme ne pouvant pas sortir de la scène.
+    """
+
+
 class GameMode(Enum):
     """
     Ressource qui definit le game mode choisi par l'utilisateur.
@@ -213,7 +220,7 @@ def __spawn_ellements(world: World):
     world.new_entity().set(
         Origin(Vec2(1, 0)),
         Scale(Vec2(10, render.HEIGHT)),
-        Position(Vec2(70, 0)),
+        Position(Vec2(0, 0)),
         Solid(),
         LeftWall(),
         CollisionHandler(__bounce_on_left_wall),
@@ -223,7 +230,7 @@ def __spawn_ellements(world: World):
     world.new_entity().set(
         Origin(Vec2(0, 0)),
         Scale(Vec2(10, render.HEIGHT)),
-        Position(Vec2(render.WIDTH - 70, 0)),
+        Position(Vec2(render.WIDTH, 0)),
         Solid(),
         RightWall(),
         CollisionHandler(__bounce_on_right_wall),
@@ -266,6 +273,7 @@ def __spawn_ellements(world: World):
         DownKey("s"),
         Speed(500),
         LastPlayerTurn(),
+        RestrictToScene(),
     )
 
     # Joueur 2
@@ -282,6 +290,7 @@ def __spawn_ellements(world: World):
         (UpKey("up"), DownKey("down"), Speed(500))
         if world[GameMode] == GameMode.TWO
         else Speed(500),
+        RestrictToScene(),
     )
 
     __spawn_ball(world)
@@ -358,6 +367,8 @@ def __spawn_ball(world: World):
 
 
 def __collision_with_ball(a: Entity, b: Entity):
+    if Ball in a:
+        a.world.new_entity().set(Sound("bound.mp3"))
     if Player1 in b or Player2 in b:
         for player in a.world.query(LastPlayerTurn):
             del player[LastPlayerTurn]
@@ -541,6 +552,7 @@ def _update_bot(world: World):
         better_distance = None
         for offset in [-100, -50, 0, 50, 100]:
             bot[Position].y = right_touch_height + offset
+            __restrict_to_scene(world)
             player.remove(Solid)
             left_wall_ball = __simulate_wall_position(ball, LeftWall)
             player.set(Solid())
@@ -558,8 +570,27 @@ def _update_bot(world: World):
 
     # On se déplace vers la meilleure option
     diff = target - bot[Position].y
-    if abs(diff) > 10:
+    if abs(diff) > bot[Speed] * world[Delta]:
         bot[Position].y += (diff / abs(diff)) * bot[Speed] * world[Delta]
+    else:
+        bot[Position].y = target
+
+    # On restrict l'entité a la scène
+    __restrict_to_scene(world)
+
+
+def __restrict_to_scene(world: World):
+    """
+    Restrinct dans la scène toutes les entitées ayant le composant RestrictToScene.
+    """
+    for entity in world.query(RestrictToScene):
+        y = entity[Position].y - (entity[Origin].y * entity[Scale].y)
+        if y < 0:
+            entity[Position].y = entity[Origin].y * entity[Scale].y
+        if y + entity[Scale].y > render.HEIGHT:
+            entity[Position].y = (
+                render.HEIGHT - entity[Scale].y + (entity[Origin].y * entity[Scale].y)
+            )
 
 
 def __check_bonus_collision(world: World):
@@ -663,7 +694,13 @@ def __update_bonus_time(world: World):
 
 __SCENE = Scene(
     [__spawn_ellements],
-    [__update_move, __check_bonus_collision, __update_animation, __update_bonus_time],
+    [
+        __update_move,
+        __check_bonus_collision,
+        __update_animation,
+        __update_bonus_time,
+        __restrict_to_scene,
+    ],
     [],
 )
 
diff --git a/src/scenes/game_over.py b/src/scenes/game_over.py
index d9f6409..38cfa4e 100644
--- a/src/scenes/game_over.py
+++ b/src/scenes/game_over.py
@@ -45,10 +45,12 @@ def __create_button(world: World, i: int, name: str):
     """
     Ajoute un bouton au monde.
     """
+    if i == 0:
+        i = -1
     world.new_entity().set(
         SpriteBundle(
             f"button_{name}.png",
-            position=Vec2(450 + 540 * i, render.HEIGHT / 2 + render.HEIGHT / 8),
+            position=Vec2(render.WIDTH / 2 + 300 * i, 800),
             order=1,
             origin=Vec2(0.5),
         ),
diff --git a/src/scenes/menu.py b/src/scenes/menu.py
index 3a04447..3e46689 100644
--- a/src/scenes/menu.py
+++ b/src/scenes/menu.py
@@ -30,10 +30,12 @@ def __create_button(world: World, i: int, name: str):
     """
     Ajoute un bouton au monde.
     """
+    if i == 0:
+        i = -1
     world.new_entity().set(
         SpriteBundle(
             f"button_{name}.png",
-            position=Vec2(450 + 540 * i, 11 * render.HEIGHT / 16),
+            position=Vec2(render.WIDTH / 2 + 300 * i, 800),
             order=1,
             origin=Vec2(0.5),
         ),
diff --git a/src/scenes/send_to_server.py b/src/scenes/send_to_server.py
index 50cb51c..c6f78e7 100644
--- a/src/scenes/send_to_server.py
+++ b/src/scenes/send_to_server.py
@@ -20,7 +20,6 @@ def new_score(world: World, e: Entity):
 
     try:
         post = {"name": name[Text], "score": world[game.Player1Score]}
-        print(post)
         rq.post(f"https://{IP}/new_score", post)
         world.new_entity().set(
             TimedEvent(
@@ -28,15 +27,15 @@ def new_score(world: World, e: Entity):
                 lambda world, entity: world.set(CurrentScene(thanks.THANKS)),
             )
         )
-    except:
-        print("Error with the serveur")
+    except Exception as error:
+        print("Error with the serveur:", error)
 
 
 def get_scores():
     try:
         return rq.get(f"https://{IP}/data").json()
-    except:
-        print("Error with the serveur")
+    except Exception as error:
+        print("Error with the serveur:", error)
 
 
 def __spawn_elements(world: World):
@@ -44,7 +43,7 @@ def __spawn_elements(world: World):
     Ajoute les éléments du menu dans le monde.
     """
 
-    world.new_entity().set(SpriteBundle("background.jpg", -5))
+    world.new_entity().set(SpriteBundle("background.png", -5))
     world.new_entity().set(
         TextBundle(
             "Quel est votre pseudo ?",
@@ -71,7 +70,7 @@ def __spawn_elements(world: World):
     world.new_entity().set(
         SpriteBundle(
             f"button_one_player.png",
-            position=Vec2(render.WIDTH / 2, 600),
+            position=Vec2(render.WIDTH / 2, 800),
             order=1,
             origin=Vec2(0.5),
         ),
diff --git a/src/scenes/thanks.py b/src/scenes/thanks.py
index 6b89809..756b5b2 100644
--- a/src/scenes/thanks.py
+++ b/src/scenes/thanks.py
@@ -8,7 +8,7 @@ from scenes import menu
 
 
 def __spawn_elements(world: World):
-    world.new_entity().set(SpriteBundle("background.jpg", -5))
+    world.new_entity().set(SpriteBundle("background.png", -5))
     world.new_entity().set(
         TextBundle(
             "Merci,",
@@ -23,7 +23,7 @@ def __spawn_elements(world: World):
         TextBundle(
             "Votre score a bien été envoyé !",
             0,
-            100,
+            80,
             position=Vec2(render.WIDTH / 2, render.HEIGHT / 2 + 75),
             origin=Vec2(0.5),
         ),
diff --git a/src/scenes/try_again.py b/src/scenes/try_again.py
index 06b9768..8ea150b 100644
--- a/src/scenes/try_again.py
+++ b/src/scenes/try_again.py
@@ -18,10 +18,12 @@ def __create_button(world: World, i: int, name: str):
     """
     Ajoute un bouton au monde.
     """
+    if i == 0:
+        i = -1
     world.new_entity().set(
         SpriteBundle(
             f"button_{name}.png",
-            position=Vec2(450 + 540 * i, render.HEIGHT / 2),
+            position=Vec2(render.WIDTH / 2 + 300 * i, 800),
             order=1,
             origin=Vec2(0.5),
         ),
@@ -52,10 +54,10 @@ def __spawn_elements(world: World):
     Ajoute les éléments du menu dans le monde.
     """
 
-    world.new_entity().set(SpriteBundle("background.jpg", -5))
+    world.new_entity().set(SpriteBundle("background.png", -5))
     world.new_entity().set(
         TextBundle(
-            "Voulez vous changer\nde mode de jeu ?",
+            "Voulez vous changer de mode de jeu ?",
             0,
             position=Vec2(render.WIDTH / 2, 350),
             origin=Vec2(0.5),