diff --git a/asset/sounds/lv_down.wav b/asset/sounds/lv_down.wav
new file mode 100644
index 0000000..943843c
Binary files /dev/null and b/asset/sounds/lv_down.wav differ
diff --git a/asset/sounds/lv_up.wav b/asset/sounds/lv_up.wav
new file mode 100644
index 0000000..b1cc725
Binary files /dev/null and b/asset/sounds/lv_up.wav differ
diff --git a/src/game.py b/src/game.py
index 52aa4d9..26ae6c0 100644
--- a/src/game.py
+++ b/src/game.py
@@ -131,8 +131,8 @@ class EasyGame(PaiaGame):
         if hits:
             for food in hits:
                 # self.ball.score += food.score
-                self.ball.eat_food(food)
-                # TODO if growth play special sound
+                # growth play special sound
+                self.ball.eat_food_and_change_level_and_play_sound(food,self.sound_controller)
                 self._create_foods(food.__class__, 1)
                 if isinstance(food, (GoodFoodLv1,GoodFoodLv2,GoodFoodLv3,)):
                     self.sound_controller.play_eating_good()
diff --git a/src/game_object.py b/src/game_object.py
index d24f1e6..252287e 100644
--- a/src/game_object.py
+++ b/src/game_object.py
@@ -5,6 +5,7 @@ import pygame.sprite
 from games.easy_game.src.env import BALL_COLOR, BALL_VEL, BALL_H, BALL_W, BALL_GROWTH_SCORE_STEP, BALL_GROWTH_SIZE_STEP, \
     BALL_SIZE_MAX, BALL_GROWTH_VEL_STEP, BALL_VEL_MAX
 from games.easy_game.src.foods import Food
+from games.easy_game.src.sound_controller import SoundController
 from mlgame.view.view_model import create_rect_view_data
 
 
@@ -18,6 +19,7 @@ class Ball(pygame.sprite.Sprite):
         self.rect.center = (400, 300)
         self._score = 0
         self._vel = BALL_VEL
+        self._lv =1
 
     def update(self, motion):
         # for motion in motions:
@@ -49,12 +51,17 @@ class Ball(pygame.sprite.Sprite):
             self.color
         )
 
-    def eat_food(self, food: Food):
+    def eat_food_and_change_level_and_play_sound(self, food: Food,sound_controller:SoundController):
         self._score += food.score
-        lv = math.ceil((self._score + 1) / BALL_GROWTH_SCORE_STEP)
-        self.rect.width = min(BALL_W + lv * BALL_GROWTH_SIZE_STEP, BALL_SIZE_MAX)
-        self.rect.height = min(BALL_H + lv * BALL_GROWTH_SIZE_STEP, BALL_SIZE_MAX)
-        self._vel = min(BALL_VEL + lv * BALL_GROWTH_VEL_STEP, BALL_VEL_MAX)
+        new_lv = math.ceil((self._score + 1) / BALL_GROWTH_SCORE_STEP)
+        self.rect.width = min(BALL_W + new_lv * BALL_GROWTH_SIZE_STEP, BALL_SIZE_MAX)
+        self.rect.height = min(BALL_H + new_lv * BALL_GROWTH_SIZE_STEP, BALL_SIZE_MAX)
+        self._vel = min(BALL_VEL + new_lv * BALL_GROWTH_VEL_STEP, BALL_VEL_MAX)
+        if new_lv > self._lv:
+            sound_controller.play_lv_up()
+        elif new_lv < self._lv:
+            sound_controller.play_lv_down()
+        self._lv=new_lv
         pass
 
     @property
diff --git a/src/sound_controller.py b/src/sound_controller.py
index 284109d..f755ed3 100644
--- a/src/sound_controller.py
+++ b/src/sound_controller.py
@@ -25,6 +25,8 @@ class SoundController():
             self._eating_good = pygame.mixer.Sound(path.join(SOUND_PATH, "Coin.wav"))
             self._eating_bad = pygame.mixer.Sound(path.join(SOUND_PATH, "Low Boing.wav"))
             self._cheer = pygame.mixer.Sound(path.join(SOUND_PATH, "Cheer.wav"))
+            self._lv_up = pygame.mixer.Sound(path.join(SOUND_PATH, "lv_up.wav"))
+            self._lv_down = pygame.mixer.Sound(path.join(SOUND_PATH, "lv_down.wav"))
         except Exception:
             self._is_sound_on = False
 
@@ -42,3 +44,11 @@ class SoundController():
     @sound_enabled
     def play_cheer(self):
         self._cheer.play()
+
+    @sound_enabled
+    def play_lv_up(self):
+        self._lv_up.play()
+
+    @sound_enabled
+    def play_lv_down(self):
+        self._lv_down.play()
\ No newline at end of file