diff --git a/level.py b/level.py
index 444f64b..7efc4a0 100644
--- a/level.py
+++ b/level.py
@@ -51,6 +51,7 @@ def __init__(self, question: str, difficulty: int):
         self.difficulty = difficulty
         self._amountOfObjects = random.randint(difficulty * 10 + 5, difficulty * 20 + 10)
         self._initialTimer = 10
+        self.number_correct = 0
 
     def start(self):
         self._startLevelTime = int(time.time())
@@ -93,6 +94,7 @@ def __on_timeout(self):
         return
 
     def __on_correct_answer(self, all_objects: pg.sprite.Group) -> pg.sprite.Group:
+        self.number_correct += 1
         return random.choice([Correct(all_objects),CorrectPicture(all_objects), DeadSheep(all_objects)]).execute()
 
     def get_amount_of_objects(self) -> int:
@@ -103,10 +105,13 @@ def is_stopped(self) -> bool:
 
     def get_question(self) -> str:
         return self.question
+    
+    def get_number_correct(self) -> int:
+        return self.number_correct
 
     def reset(self):
         self._startLevelTime: int = -1
         self._stopLevelTime: int = -1
         self.answer: str = ""
         self._amountOfObjects = random.randint(self.difficulty * 10 + 5, self.difficulty * 20 + 10)
-        self.start()
\ No newline at end of file
+        self.start()
diff --git a/main-window.py b/main-window.py
index 63b9979..135b9df 100644
--- a/main-window.py
+++ b/main-window.py
@@ -200,7 +200,10 @@ def main():
         timerColor=(0,0,0)
         if timer <= 5:
             timerColor=(255,0,0)
-        text = font.render(str(timer), True, timerColor)
+        timer_str = str(timer)
+        if currentLevel.number_correct > 4:
+            timer_str = str(bin(timer)[2:])
+        text = font.render(timer_str, True, timerColor)
         textpos = text.get_rect(centerx=co.rb_topright[0], y=co.rb_topright[1] - 50)
         screen.blit(text, textpos)