l16 - GameManager

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class GameManager : MonoBehaviour
{
    //Game Manager Instance
    public static GameManager instance;
    //List of bricks
    public List<GameObject> bricks = new List<GameObject>();
    //Our ball script
    public ArcanoidBall ball;
    //is the game in progress?
    bool gameRun = false;

    void Awake()
    {
        //Assigning an object to instance. Creating Singleton
        if(instance == null)
        {
            instance = this;
        }

        //Getting all Bricks and (by Brick tag) and adding them to the list
        bricks.AddRange(GameObject.FindGameObjectsWithTag("Brick"));

    }

    void Update()
    {
        //Starting the game when clicking space (if it's not on yet)
        if (Input.GetKeyDown(KeyCode.Space) && !gameRun)
        {
            ball.RunBall();
            gameRun = true;
        }

        //Ending the game when all bricks are gone
        if(gameRun && bricks.Count == 0)
        {
            EndGame(true);
        }

        //If the game is over, reset the scene with R key
        if(!gameRun)
        {
            if(Input.GetKeyDown(KeyCode.R))
            {
                SceneManager.LoadScene(0);
            }
        }
    }

    //Ending game function
    public void EndGame(bool win)
    {
        gameRun = false;
        string txt = win ? "Wygrana!" : "Przegrana!";
        Debug.Log(txt);
        ball.StopBall();
    }
}