diff --git a/assets/test_button_hover.png b/assets/test_button_hover.png
new file mode 100644
index 0000000..89cbda0
Binary files /dev/null and b/assets/test_button_hover.png differ
diff --git a/assets/test_button_normal.png b/assets/test_button_normal.png
new file mode 100644
index 0000000..706e5f1
Binary files /dev/null and b/assets/test_button_normal.png differ
diff --git a/gui/scene/FPSCounterScene.py b/gui/scene/FPSCounterScene.py
deleted file mode 100644
index f10c5b4..0000000
--- a/gui/scene/FPSCounterScene.py
+++ /dev/null
@@ -1,22 +0,0 @@
-from typing import Optional
-
-import pyglet
-
-from gui.scene import Scene
-from gui.window import Window
-
-
-class FPSCounterScene(Scene):
-    """
-    This scene represent a simple FPS Counter.
-    """
-
-    def __init__(self):
-        self.fps_display: Optional[pyglet.window.FPSDisplay] = None
-
-    def on_window_added(self, window: Window):
-        # the fps display need to be defined here because it is the moment where the window is first accessible
-        self.fps_display = pyglet.window.FPSDisplay(window=window)
-
-    def on_draw(self, window: Window) -> None:
-        self.fps_display.draw()
diff --git a/gui/scene/Scene.py b/gui/scene/Scene.py
deleted file mode 100644
index 6e79a1f..0000000
--- a/gui/scene/Scene.py
+++ /dev/null
@@ -1,43 +0,0 @@
-import pyglet.event
-
-from gui.window import Window
-
-
-class Scene(pyglet.event.EventDispatcher):
-    """
-    This class represent a scene that can be applied to a pyglet window.
-
-    The scene can represent anything like the main menu, the game, the
-    options' menu, the multiplayer menu, ...
-    """
-
-    def on_window_added(self, window: Window): pass  # when the Scene is added to a window
-    def on_window_removed(self, window: Window): pass  # when the Scene is removed from a window
-
-    def on_draw(self, window: Window): pass
-    def on_resize(self, window: Window, width: int, height: int): pass
-    def on_hide(self, window: Window): pass
-    def on_show(self, window: Window): pass
-    def on_close(self, window: Window): pass
-    def on_expose(self, window: Window): pass
-    def on_activate(self, window: Window): pass
-    def on_deactivate(self, window: Window): pass
-    def on_text(self, window: Window, char: str): pass
-    def on_move(self, window: Window, x: int, y: int): pass
-    def on_context_lost(self, window: Window): pass
-    def on_context_state_lost(self, window: Window): pass
-    def on_key_press(self, window: Window, symbol: int, modifiers: int): pass
-    def on_key_release(self, window: Window, symbol: int, modifiers: int): pass
-    def on_key_held(self, window: Window, dt: float, symbol: int, modifiers: int): pass
-    def on_mouse_enter(self, window: Window, x: int, y: int): pass
-    def on_mouse_leave(self, window: Window, x: int, y: int): pass
-    def on_text_motion(self, window: Window, motion: int): pass
-    def on_text_motion_select(self, window: Window, motion: int): pass
-    def on_mouse_motion(self, window: Window, x: int, y: int, dx: int, dy: int): pass
-    def on_mouse_press(self, window: Window, x: int, y: int, button: int, modifiers: int): pass
-    def on_mouse_release(self, window: Window, x: int, y: int, button: int, modifiers: int): pass
-    def on_mouse_drag(self, window: Window, x: int, y: int, dx: int, dy: int, buttons: int, modifiers: int): pass
-    def on_mouse_scroll(self, window: Window, x: int, y: int, scroll_x: float, scroll_y: float): pass
-
-
-
diff --git a/main.pyw b/main.pyw
index ad70233..1df1c41 100644
--- a/main.pyw
+++ b/main.pyw
@@ -1,12 +1,29 @@
 import pyglet
 
-from gui.window import Window
-from gui.scene import HelloWorldScene, FPSCounterScene
+from source.gui.widget.Button import Button
+from source.gui.window import Window
+from source.gui.scene import HelloWorldScene, FPSCounterScene
 
 # Créer une fenêtre
 window = Window(resizable=True, visible=False)
 
-window.add_scene(HelloWorldScene(), FPSCounterScene())
+button_normal_image = pyglet.image.load("./assets/test_button_normal.png")
+button_hover_image = pyglet.image.load("./assets/test_button_hover.png")
+
+hello_world_scene = HelloWorldScene()
+
+button = Button(
+    50, 50, 300, 100,
+    text="HELLO",
+    on_release=lambda *a, **b: print(a, b),
+    normal_image=button_normal_image,
+    hover_image=button_hover_image,
+)
+
+hello_world_scene.add_widget(button)
+fps_counter_scene = FPSCounterScene()
+
+window.add_scene(hello_world_scene, fps_counter_scene)
 
 # Lance la fenêtre
 window.set_visible(True)
diff --git a/source/__init__.py b/source/__init__.py
index d63e215..e69de29 100644
--- a/source/__init__.py
+++ b/source/__init__.py
@@ -1,2 +0,0 @@
-from .Boat import Boat
-from .Board import Board
diff --git a/source/Board.py b/source/core/Board.py
similarity index 96%
rename from source/Board.py
rename to source/core/Board.py
index 8024dd1..3663822 100644
--- a/source/Board.py
+++ b/source/core/Board.py
@@ -1,8 +1,8 @@
 import numpy as np
 
-from source import Boat
-from source.enums import Orientation, BombState
-from source.error import InvalidBoatPosition, PositionAlreadyShot
+from source.core import Boat
+from source.core.enums import Orientation, BombState
+from source.core.error import InvalidBoatPosition, PositionAlreadyShot
 from source.utils import copy_array_offset
 
 
diff --git a/source/Boat.py b/source/core/Boat.py
similarity index 94%
rename from source/Boat.py
rename to source/core/Boat.py
index 52a3cd0..6c815f9 100644
--- a/source/Boat.py
+++ b/source/core/Boat.py
@@ -1,6 +1,6 @@
 import numpy as np
 
-from source.enums import Orientation
+from source.core.enums import Orientation
 
 
 class Boat:
diff --git a/gui/__init__.py b/source/core/__init__.py
similarity index 100%
rename from gui/__init__.py
rename to source/core/__init__.py
diff --git a/source/enums/__init__.py b/source/core/enums/__init__.py
similarity index 100%
rename from source/enums/__init__.py
rename to source/core/enums/__init__.py
diff --git a/source/enums/bomb.py b/source/core/enums/bomb.py
similarity index 100%
rename from source/enums/bomb.py
rename to source/core/enums/bomb.py
diff --git a/source/enums/orientation.py b/source/core/enums/orientation.py
similarity index 100%
rename from source/enums/orientation.py
rename to source/core/enums/orientation.py
diff --git a/source/error/InvalidBoatPosition.py b/source/core/error/InvalidBoatPosition.py
similarity index 100%
rename from source/error/InvalidBoatPosition.py
rename to source/core/error/InvalidBoatPosition.py
diff --git a/source/error/PositionAlreadyShot.py b/source/core/error/PositionAlreadyShot.py
similarity index 100%
rename from source/error/PositionAlreadyShot.py
rename to source/core/error/PositionAlreadyShot.py
diff --git a/source/error/__init__.py b/source/core/error/__init__.py
similarity index 100%
rename from source/error/__init__.py
rename to source/core/error/__init__.py
diff --git a/source/gui/__init__.py b/source/gui/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/source/gui/scene/FPSCounterScene.py b/source/gui/scene/FPSCounterScene.py
new file mode 100644
index 0000000..728d1c1
--- /dev/null
+++ b/source/gui/scene/FPSCounterScene.py
@@ -0,0 +1,30 @@
+from typing import Optional, TYPE_CHECKING
+
+import pyglet
+
+from source.gui.scene.base import Scene
+
+if TYPE_CHECKING:
+    from source.gui.window import Window
+
+
+class FPSCounterScene(Scene):
+    """
+    This scene represent a simple FPS Counter.
+    """
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.fps_display: Optional[pyglet.window.FPSDisplay] = None
+
+    def on_window_added(self, window: "Window"):
+        super().on_window_added(window)
+
+        # the fps display need to be defined here because it is the moment where the window is first accessible
+        self.fps_display = pyglet.window.FPSDisplay(window=window)
+
+    def on_draw(self, window: "Window") -> None:
+        super().on_draw(window)
+
+        self.fps_display.draw()
diff --git a/gui/scene/HelloWorldScene.py b/source/gui/scene/HelloWorldScene.py
similarity index 60%
rename from gui/scene/HelloWorldScene.py
rename to source/gui/scene/HelloWorldScene.py
index 1d48600..4dad084 100644
--- a/gui/scene/HelloWorldScene.py
+++ b/source/gui/scene/HelloWorldScene.py
@@ -2,8 +2,12 @@ from datetime import datetime, timedelta
 
 import pyglet
 
-from gui.scene import Scene
-from gui.window import Window
+from source.gui.scene.base import Scene
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from source.gui.window import Window
 
 
 class HelloWorldScene(Scene):
@@ -14,7 +18,9 @@ class HelloWorldScene(Scene):
     The text is centered on the screen.
     """
 
-    def __init__(self):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
         self.label = pyglet.text.Label(
             "Hello World !",
             anchor_x="center",
@@ -24,17 +30,25 @@ class HelloWorldScene(Scene):
         # remember the cooldown for the backspace button
         self._hold_backspace_last_call: datetime = datetime.now()
 
-    def on_draw(self, window: Window) -> None:
+    def on_draw(self, window: "Window") -> None:
+        super().on_draw(window)
+
         self.label.draw()
 
-    def on_resize(self, window: Window, width: int, height: int) -> None:
+    def on_resize(self, window: "Window", width: int, height: int) -> None:
+        super().on_resize(window, width, height)
+
         self.label.x = width // 2
         self.label.y = height // 2
 
-    def on_text(self, window: Window, char: str):
+    def on_text(self, window: "Window", char: str):
+        super().on_text(window, char)
+
         self.label.text += char
 
-    def on_key_held(self, window: Window, dt: float, symbol: int, modifiers: int):
+    def on_key_held(self, window: "Window", dt: float, symbol: int, modifiers: int):
+        super().on_key_held(window, dt, symbol, modifiers)
+
         if symbol == pyglet.window.key.BACKSPACE:
 
             # add a cooldown of 0.1 second on the backspace key
diff --git a/source/gui/scene/MainMenu.py b/source/gui/scene/MainMenu.py
new file mode 100644
index 0000000..b2eba66
--- /dev/null
+++ b/source/gui/scene/MainMenu.py
@@ -0,0 +1,18 @@
+from source.gui.scene.base import Scene
+from source.gui.widget.Button import Button
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from source.gui.window import Window
+
+
+class MainMenuScene(Scene):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.add_widget(Button())
+
+    def on_draw(self, window: "Window"):
+        super().on_draw(window)
+
diff --git a/gui/scene/__init__.py b/source/gui/scene/__init__.py
similarity index 78%
rename from gui/scene/__init__.py
rename to source/gui/scene/__init__.py
index 5d2aaee..8fa93cf 100644
--- a/gui/scene/__init__.py
+++ b/source/gui/scene/__init__.py
@@ -1,3 +1,2 @@
-from .Scene import Scene
 from .HelloWorldScene import HelloWorldScene
 from .FPSCounterScene import FPSCounterScene
diff --git a/source/gui/scene/base/Scene.py b/source/gui/scene/base/Scene.py
new file mode 100644
index 0000000..93dcb03
--- /dev/null
+++ b/source/gui/scene/base/Scene.py
@@ -0,0 +1,116 @@
+from pyglet.event import EventDispatcher
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from source.gui.widget.base import Widget
+    from source.gui.window import Window
+
+
+class Scene(EventDispatcher):
+    """
+    This class represent a scene that can be applied to a pyglet window.
+
+    The scene can represent anything like the main menu, the game, the
+    options' menu, the multiplayer menu, ...
+    """
+
+    def __init__(self, widgets: list["Widget"] = None):
+        self._widgets: list["Widget"] = []
+        if widgets is not None: self.add_widget(*widgets)
+
+    def add_widget(self, *widgets: "Widget", priority: int = 0) -> None:
+        for widget in widgets:
+            self._widgets.insert(priority, widget)
+            widget.on_scene_added(self)
+
+    def remove_widget(self, *widgets: "Widget") -> None:
+        for widget in widgets:
+            widget.on_scene_removed(self)
+            self._widgets.remove(widget)
+
+    def clear_widget(self) -> None:
+        for widget in self._widgets: widget.on_scene_removed(self)
+        self._widgets.clear()
+
+    # scene event
+
+    def on_window_added(self, window: "Window"):  # when the Scene is added to a window
+        for widget in self._widgets: widget.on_window_added(window, self)
+
+    def on_window_removed(self, window: "Window"):  # when the Scene is removed from a window
+        for widget in self._widgets: widget.on_window_removed(window, self)
+
+    # window event
+
+    def on_draw(self, window: "Window"):
+        for widget in self._widgets: widget.on_draw(window, self)
+
+    def on_resize(self, window: "Window", width: int, height: int):
+        for widget in self._widgets: widget.on_resize(window, self, width, height)
+
+    def on_hide(self, window: "Window"):
+        for widget in self._widgets: widget.on_hide(window, self)
+
+    def on_show(self, window: "Window"):
+        for widget in self._widgets: widget.on_show(window, self)
+
+    def on_close(self, window: "Window"):
+        for widget in self._widgets: widget.on_close(window, self)
+
+    def on_expose(self, window: "Window"):
+        for widget in self._widgets: widget.on_expose(window, self)
+
+    def on_activate(self, window: "Window"):
+        for widget in self._widgets: widget.on_activate(window, self)
+
+    def on_deactivate(self, window: "Window"):
+        for widget in self._widgets: widget.on_deactivate(window, self)
+
+    def on_text(self, window: "Window", char: str):
+        for widget in self._widgets: widget.on_text(window, self, char)
+
+    def on_move(self, window: "Window", x: int, y: int):
+        for widget in self._widgets: widget.on_move(window, self, x, y)
+
+    def on_context_lost(self, window: "Window"):
+        for widget in self._widgets: widget.on_context_lost(window, self)
+
+    def on_context_state_lost(self, window: "Window"):
+        for widget in self._widgets: widget.on_context_state_lost(window, self)
+
+    def on_key_press(self, window: "Window", symbol: int, modifiers: int):
+        for widget in self._widgets: widget.on_key_press(window, self, symbol, modifiers)
+
+    def on_key_release(self, window: "Window", symbol: int, modifiers: int):
+        for widget in self._widgets: widget.on_key_release(window, self, symbol, modifiers)
+
+    def on_key_held(self, window: "Window", dt: float, symbol: int, modifiers: int):
+        for widget in self._widgets: widget.on_key_held(window, self, dt, symbol, modifiers)
+
+    def on_mouse_enter(self, window: "Window", x: int, y: int):
+        for widget in self._widgets: widget.on_mouse_enter(window, self, x, y)
+
+    def on_mouse_leave(self, window: "Window", x: int, y: int):
+        for widget in self._widgets: widget.on_mouse_leave(window, self, x, y)
+
+    def on_text_motion(self, window: "Window", motion: int):
+        for widget in self._widgets: widget.on_text_motion(window, self, motion)
+
+    def on_text_motion_select(self, window: "Window", motion: int):
+        for widget in self._widgets: widget.on_text_motion_select(window, self, motion)
+
+    def on_mouse_motion(self, window: "Window", x: int, y: int, dx: int, dy: int):
+        for widget in self._widgets: widget.on_mouse_motion(window, self, x, y, dx, dy)
+
+    def on_mouse_press(self, window: "Window", x: int, y: int, button: int, modifiers: int):
+        for widget in self._widgets: widget.on_mouse_press(window, self, x, y, button, modifiers)
+
+    def on_mouse_release(self, window: "Window", x: int, y: int, button: int, modifiers: int):
+        for widget in self._widgets: widget.on_mouse_release(window, self, x, y, button, modifiers)
+
+    def on_mouse_drag(self, window: "Window", x: int, y: int, dx: int, dy: int, buttons: int, modifiers: int):
+        for widget in self._widgets: widget.on_mouse_drag(window, self, x, y, dx, dy, buttons, modifiers)
+
+    def on_mouse_scroll(self, window: "Window", x: int, y: int, scroll_x: float, scroll_y: float):
+        for widget in self._widgets: widget.on_mouse_scroll(window, self, x, y, scroll_x, scroll_y)
diff --git a/source/gui/scene/base/__init__.py b/source/gui/scene/base/__init__.py
new file mode 100644
index 0000000..8abb0fe
--- /dev/null
+++ b/source/gui/scene/base/__init__.py
@@ -0,0 +1 @@
+from .Scene import Scene
diff --git a/source/gui/widget/Button.py b/source/gui/widget/Button.py
new file mode 100644
index 0000000..c23266a
--- /dev/null
+++ b/source/gui/widget/Button.py
@@ -0,0 +1,123 @@
+from typing import Callable, Optional, TYPE_CHECKING
+
+import pyglet
+
+from source.gui.widget.base import Widget
+from source.utils import in_bbox
+
+if TYPE_CHECKING:
+    from source.gui.scene.base import Scene
+    from source.gui.window import Window
+
+
+class Button(Widget):
+    __slots__ = ("_x", "_y", "_width", "_height", "_text", "on_press", "on_release", "_normal_image", "_hover_image",
+                 "_hovering")
+
+    def __init__(self,
+                 x: int,
+                 y: int,
+                 width: int,
+                 height: int,
+                 on_press: Optional[Callable] = None,
+                 on_release: Optional[Callable] = None,
+                 normal_image: pyglet.image.AbstractImage = None,
+                 hover_image: pyglet.image.AbstractImage = None,
+                 *args, **kwargs
+                 ):
+
+        # TODO: use batch
+        # TODO: make the label centered in the button
+        # TODO: use texture bin and animation to simplify the image handling ?
+
+        self.label = pyglet.text.Label(*args, **kwargs)
+
+        self._hovering = False
+        self._normal_sprite = pyglet.sprite.Sprite(normal_image)
+        self._hover_sprite = pyglet.sprite.Sprite(hover_image)
+
+        self.on_press: Optional[Callable[["Window", "Scene", int, int, int, int], None]] = on_press
+        self.on_release: Optional[Callable[["Window", "Scene", int, int, int, int], None]] = on_release
+
+        self.x: int = x
+        self.y: int = y
+        self.width: int = width
+        self.height: int = height
+
+    # function
+
+    def _update_sprite_size(self, x: int = None, y: int = None, width: int = None, height: int = None):
+        for sprite in self._normal_sprite, self._hover_sprite:
+            sprite.update(
+                x=x,
+                y=y,
+                scale_x=None if width is None else width / sprite.width,
+                scale_y=None if height is None else height / sprite.height,
+            )
+
+    # button getter and setter
+
+    @property
+    def background_sprite(self) -> Optional[pyglet.sprite.Sprite]:
+        return self._hover_sprite if self._hovering else self._normal_sprite
+
+    @property
+    def bbox(self) -> tuple[int, int, int, int]:
+        return self.x, self.y, self.x + self.width, self.y + self.height
+
+    # label getter and setter
+
+    @property
+    def x(self) -> int: return self._x
+
+    @x.setter
+    def x(self, value: int):
+        self._x = value
+        self.label.x = value
+        self._update_sprite_size(x=value)
+
+    @property
+    def y(self) -> int: return self._y
+
+    @y.setter
+    def y(self, value: int):
+        self._y = value
+        self.label.y = value
+        self._update_sprite_size(y=value)
+
+    @property
+    def width(self) -> int: return self._width
+
+    @width.setter
+    def width(self, value: int):
+        self._width = value
+        self.label.width = value
+        self._update_sprite_size(width=value)
+
+    @property
+    def height(self) -> int: return self._height
+
+    @height.setter
+    def height(self, value: int):
+        self._height = value
+        self.label.height = value
+        self._update_sprite_size(height=value)
+
+    # event
+
+    def on_mouse_press(self, window: "Window", scene: "Scene", x: int, y: int, button: int, modifiers: int):
+        if not in_bbox((x, y), self.bbox): return
+        if self.on_press is not None: self.on_press(window, scene, x, y, button, modifiers)
+
+    def on_mouse_release(self, window: "Window", scene: "Scene", x: int, y: int, button: int, modifiers: int):
+        if not in_bbox((x, y), self.bbox): return
+        if self.on_release is not None: self.on_release(window, scene, x, y, button, modifiers)
+
+    def on_mouse_motion(self, window: "Window", scene: "Scene", x: int, y: int, dx: int, dy: int):
+        self._hovering = in_bbox((x, y), self.bbox)
+
+    def on_draw(self, window: "Window", scene: "Scene"):
+        if (bg := self.background_sprite) is not None:
+            bg.draw()
+
+        self.label.draw()
diff --git a/source/gui/widget/__init__.py b/source/gui/widget/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/source/gui/widget/base/Widget.py b/source/gui/widget/base/Widget.py
new file mode 100644
index 0000000..8a6f489
--- /dev/null
+++ b/source/gui/widget/base/Widget.py
@@ -0,0 +1,50 @@
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from source.gui.scene.base import Scene
+    from source.gui.window import Window
+
+
+class Widget:
+    """
+    This class represent a widget that can be attached to a Scene.
+
+    It can be used to create a button, a label, ...
+    """
+
+    # widget event
+
+    def on_scene_added(self, scene: "Scene"): pass
+    def on_scene_removed(self, scene: "Scene"): pass
+
+    # scene event
+
+    def on_window_added(self, window: "Window", scene: "Scene"): pass
+    def on_window_removed(self, window: "Window", scene: "Scene"): pass
+
+    # global event
+
+    def on_draw(self, window: "Window", scene: "Scene"): pass
+    def on_resize(self, window: "Window", scene: "Scene", width: int, height: int): pass
+    def on_hide(self, window: "Window", scene: "Scene"): pass
+    def on_show(self, window: "Window", scene: "Scene"): pass
+    def on_close(self, window: "Window", scene: "Scene"): pass
+    def on_expose(self, window: "Window", scene: "Scene"): pass
+    def on_activate(self, window: "Window", scene: "Scene"): pass
+    def on_deactivate(self, window: "Window", scene: "Scene"): pass
+    def on_text(self, window: "Window", scene: "Scene", char: str): pass
+    def on_move(self, window: "Window", scene: "Scene", x: int, y: int): pass
+    def on_context_lost(self, window: "Window", scene: "Scene"): pass
+    def on_context_state_lost(self, window: "Window", scene: "Scene"): pass
+    def on_key_press(self, window: "Window", scene: "Scene", symbol: int, modifiers: int): pass
+    def on_key_release(self, window: "Window", scene: "Scene", symbol: int, modifiers: int): pass
+    def on_key_held(self, window: "Window", scene: "Scene", dt: float, symbol: int, modifiers: int): pass
+    def on_mouse_enter(self, window: "Window", scene: "Scene", x: int, y: int): pass
+    def on_mouse_leave(self, window: "Window", scene: "Scene", x: int, y: int): pass
+    def on_text_motion(self, window: "Window", scene: "Scene", motion: int): pass
+    def on_text_motion_select(self, window: "Window", scene: "Scene", motion: int): pass
+    def on_mouse_motion(self, window: "Window", scene: "Scene", x: int, y: int, dx: int, dy: int): pass
+    def on_mouse_press(self, window: "Window", scene: "Scene", x: int, y: int, button: int, modifiers: int): pass
+    def on_mouse_release(self, window: "Window", scene: "Scene", x: int, y: int, button: int, modifiers: int): pass
+    def on_mouse_drag(self, window: "Window", scene: "Scene", x: int, y: int, dx: int, dy: int, buttons: int, modifiers: int): pass
+    def on_mouse_scroll(self, window: "Window", scene: "Scene", x: int, y: int, scroll_x: float, scroll_y: float): pass
diff --git a/source/gui/widget/base/__init__.py b/source/gui/widget/base/__init__.py
new file mode 100644
index 0000000..ab73ff2
--- /dev/null
+++ b/source/gui/widget/base/__init__.py
@@ -0,0 +1 @@
+from .Widget import Widget
diff --git a/gui/window/Window.py b/source/gui/window/Window.py
similarity index 92%
rename from gui/window/Window.py
rename to source/gui/window/Window.py
index 168c3b5..bdfff5a 100644
--- a/gui/window/Window.py
+++ b/source/gui/window/Window.py
@@ -1,8 +1,9 @@
-from typing import Optional, Callable
+from typing import Optional, Callable, TYPE_CHECKING
 
 import pyglet.window
 
-from gui.scene import Scene
+if TYPE_CHECKING:
+    from source.gui.scene import Scene
 
 
 class Window(pyglet.window.Window):  # NOQA - pycharm think pyglet window is abstract
@@ -14,9 +15,10 @@ class Window(pyglet.window.Window):  # NOQA - pycharm think pyglet window is abs
     putting everything in the window code.
     """
 
-    def __init__(self, *args, scenes: Optional[Scene] = None, **kwargs):
+    def __init__(self, scenes: Optional["Scene"] = None, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self._scenes: list[Scene] = [] if scenes is None else scenes
+        self._scenes: list["Scene"] = []
+        if scenes is not None: self.add_scene(*scenes)
 
         # add a keys handler to the window
         self.keys = pyglet.window.key.KeyStateHandler()
@@ -27,7 +29,7 @@ class Window(pyglet.window.Window):  # NOQA - pycharm think pyglet window is abs
 
     # scene methods
 
-    def set_scene(self, *scenes: Scene) -> None:
+    def set_scene(self, *scenes: "Scene") -> None:
         """
         Set the scene(s) of the window
         :param scenes: the scene(s) to set
@@ -42,7 +44,7 @@ class Window(pyglet.window.Window):  # NOQA - pycharm think pyglet window is abs
         for scene in self._scenes: scene.on_window_removed(self)
         self._scenes.clear()
 
-    def add_scene(self, *scenes: Scene, priority: int = 0) -> None:
+    def add_scene(self, *scenes: "Scene", priority: int = 0) -> None:
         """
         Add a scene to the window
         :param scenes: the scene to add
@@ -52,7 +54,7 @@ class Window(pyglet.window.Window):  # NOQA - pycharm think pyglet window is abs
             self._scenes.insert(priority, scene)
             scene.on_window_added(self)
 
-    def remove_scene(self, *scenes: Scene) -> None:
+    def remove_scene(self, *scenes: "Scene") -> None:
         """
         Remove a scene from the window
         :param scenes: the scene to remove
diff --git a/gui/window/__init__.py b/source/gui/window/__init__.py
similarity index 96%
rename from gui/window/__init__.py
rename to source/gui/window/__init__.py
index 262037f..2391d96 100644
--- a/gui/window/__init__.py
+++ b/source/gui/window/__init__.py
@@ -1 +1,2 @@
 from .Window import Window
+
diff --git a/source/utils/__init__.py b/source/utils/__init__.py
index 22d9bd9..3c0dad2 100644
--- a/source/utils/__init__.py
+++ b/source/utils/__init__.py
@@ -1 +1,2 @@
 from .copy_array_offset import copy_array_offset
+from .in_bbox import in_bbox
diff --git a/source/utils/in_bbox.py b/source/utils/in_bbox.py
new file mode 100644
index 0000000..0f4e4d2
--- /dev/null
+++ b/source/utils/in_bbox.py
@@ -0,0 +1,14 @@
+def in_bbox(point: tuple[int, int], bbox: tuple[int, int, int, int]) -> bool:
+    """
+    Return true if a point is inside a bounding box
+    :param point: the point to check
+    :param bbox: the bbox where to check the point
+    :return: True if the point is inside the bbox, False otherwise
+    """
+
+    point_x, point_y = point
+    bbox_x1, bbox_y1, bbox_x2, bbox_y2 = bbox
+
+    if not bbox_x1 <= point_x <= bbox_x2: return False
+    if not bbox_y1 <= point_y <= bbox_y2: return False
+    return True