diff --git a/snake/game_object.py b/snake/game_object.py
index 9346d83..7cd0821 100644
--- a/snake/game_object.py
+++ b/snake/game_object.py
@@ -5,5 +5,9 @@ class GameObject:
     def draw(self, surface: pygame.Surface) -> None:
         pass
 
-    def update(self, user_input: int) -> None:
-        pass
\ No newline at end of file
+    def update(self, user_input: int, game_objs: list['GameObject']) -> None:
+        pass
+
+    def get_bounding_boxes(self) -> list[pygame.rect.Rect]:
+        return []
+    
\ No newline at end of file
diff --git a/snake/main.py b/snake/main.py
index daa392e..c85addd 100644
--- a/snake/main.py
+++ b/snake/main.py
@@ -15,7 +15,7 @@ def draw_all(window: Window, game_objs: list[GameObject]) -> None:
 
 def update_all(game_objs: list[GameObject], user_input: int) -> None:
     for obj in game_objs:
-        obj.update(user_input)
+        obj.update(user_input, game_objs)
 
 
 def create_game_objects(window):
diff --git a/snake/snake.py b/snake/snake.py
index 6658b02..f7abdba 100644
--- a/snake/snake.py
+++ b/snake/snake.py
@@ -2,6 +2,7 @@ import pygame
 from game_object import GameObject
 from snake_segment import SnakeSegment
 from snake_state_machine import SnakeStateMachine
+from wall import Wall
 
 
 class Snake(GameObject):
@@ -12,14 +13,32 @@ class Snake(GameObject):
                            for idx in range(length)]
         
         self.__state_machine = SnakeStateMachine()
+        self.__is_dead = False
+
+    
+    def __collides_with_wall(self, obj: GameObject):
+        return isinstance(obj, Wall) and self.get_bounding_boxes()[0].collidelist(obj.get_bounding_boxes()) > -1
+             
+
+    def __update_on_collision(self, game_objs: list[GameObject]) -> None:
+        for obj in game_objs:
+            if self.__collides_with_wall(obj):
+                self.__is_dead = True
+
 
     def draw(self, surface: pygame.Surface) -> None:
         for segment in self.__segments:
             segment.draw(surface)
 
-    def update(self, user_input: int=None) -> None:
-        self.__state_machine.update(user_input)
-        new_head = self.__state_machine.get_state().get_next_head(self.__segments[0])
-        
-        self.__segments.insert(0, new_head)
-        self.__segments.pop()
\ No newline at end of file
+    def update(self, user_input: int, game_objs: list[GameObject]) -> None:
+        if not self.__is_dead:
+            self.__update_on_collision(game_objs)
+
+            self.__state_machine.update(user_input)
+            new_head = self.__state_machine.get_state().get_next_head(self.__segments[0])
+            
+            self.__segments.insert(0, new_head)
+            self.__segments.pop()
+
+    def get_bounding_boxes(self) -> list[pygame.rect.Rect]:
+        return [seg.get_bounding_boxes()[0] for seg in self.__segments]
\ No newline at end of file
diff --git a/snake/snake_segment.py b/snake/snake_segment.py
index 07a860c..88621f7 100644
--- a/snake/snake_segment.py
+++ b/snake/snake_segment.py
@@ -1,24 +1,28 @@
 import pygame
 from game_object import GameObject
 
+
 class SnakeSegment(GameObject):
     def __init__(self, center: tuple|list, radius: float|int, color: tuple) -> None:
-        self.__center = center
-        self.__radius = radius
+        self.__bounding_box = pygame.rect.Rect(0, 0, radius*2, radius*2)
+        self.__bounding_box.center = center
         self.__color = color
 
     
     def draw(self, surface: pygame.Surface) -> None:
         pygame.draw.circle(surface=surface, 
                            color=self.__color,
-                           center=self.__center,
-                           radius=self.__radius)
+                           center=self.__bounding_box.center,
+                           radius=self.__bounding_box.width*0.5)
         
     def get_position(self) -> tuple:
-        return self.__center
+        return self.__bounding_box.center
     
     def get_radius(self) -> int|float:
-        return self.__radius
+        return self.__bounding_box.width*0.5
     
     def get_color(self) -> tuple:
-        return self.__color
\ No newline at end of file
+        return self.__color
+    
+    def get_bounding_boxes(self) -> list[pygame.rect.Rect]:
+        return [self.__bounding_box]
\ No newline at end of file
diff --git a/snake/wall.py b/snake/wall.py
index 9424e76..b3ebaa1 100644
--- a/snake/wall.py
+++ b/snake/wall.py
@@ -18,4 +18,7 @@ class Wall(GameObject):
     def draw(self, surface):
         for wall in self.__walls:
             pygame.draw.rect(surface, self.__color, wall)
-    
\ No newline at end of file
+    
+
+    def get_bounding_boxes(self):
+        return self.__walls