Why not just use static variables?

[chris113377]

public class Block : MonoBehaviour
{
    [SerializeField] private AudioClip breakSound;
    private static int breakableBlocks;
    private static int blocksDestroyed;

    private SceneLoader sceneLoader;

    void Start()
    {
        breakableBlocks++;

        sceneLoader = FindObjectOfType<SceneLoader>();
    }

    void OnCollisionEnter2D(Collision2D collision)
    {
        AudioSource.PlayClipAtPoint(breakSound, Camera.main.transform.position);
        Destroy(gameObject);

        ++blocksDestroyed;

        if (blocksDestroyed == breakableBlocks)
        {
            sceneLoader.LoadNextScene();
        }
    }
}

[Nina]

Hi Chris,

Welcome to our community!

static variables might appear convenient but they are also dangerous because all Block objects could manipulate the value of that variable. Debugging might become challenging.

Also see here. https://stackoverflow.com/questions/7026507/why-are-static-variables-considered-evil/7026563#7026563

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