Block Breaker

Hi everyone !!!

I have a question regarding the score part in udemy course “ Complete C# Unity Developer 2D: Learn to Code Making Games ” - BLOCK BREAKER

How can you keep the previous score of the previous level while pressing on PLAY AGAIN ??? 

I used this method in the SceneLoader.cs :

public void LoadPreviousScene()
    {
        int currentSceneIndex = SceneManager.GetActiveScene().buildIndex;
        SceneManager.LoadScene(currentSceneIndex - 1);
    }