load level issue

good morning all i got a problem :- when i "complete level" unity should load next level but it doesnt it gives random t$$anonymous$$ngs it may load the main menu or just do not$$anonymous$$ng it shows the continue button to next level but it doesnt load it , enemies keep moving and i am at goal i can move and do everyt$$anonymous$$ng like if i didnt finish the level it happened when i tried to add somet$$anonymous$$ng to my code that reset timer , i deleted that reset code but the problem still exists ,now i dont even know what happened, i had a problem like that but idk how i fixed it i will give u the code i hope u help me

 public int currentLevel = 0;

 
 void Start()
 {

    
     if (PlayerPrefs.GetInt("Level Completed") >2)
     {
         currentLevel = PlayerPrefs.GetInt("Level Completed");
     }
     else
     {
         currentLevel =0;
         
     }

 }
 public void LoadNextLevel()
 {
     Time.timeScale = 1f;
     if (currentLevel <= 6)
     {

         currentLevel += 1;
         print(currentLevel);

         SaveGame();
         Application.LoadLevel(currentLevel);
     }
 else
     {
         print("You Win!");


     }
 }

 public void SaveGame()
 {
     PlayerPrefs.SetInt("Level Completed", currentLevel);
     PlayerPrefs.SetInt("Level " + currentLevel.ToString() + " score", currentScore);
 }