Space Shooter Tutorial ending the game, Application.loadLevel is obsolete?

Questions & Answers
1

In the tutorial it has you write the following code in the the gamecontroller to restart the game. Unity says that Application.LoadLevel (Application.loadedLevel); is obsolete. It says to use SceneManager. I’m new to unity and I am not sure how to do so. Any one know how to fix this? or is there an udated tutorial I don’t know about? thanks guys
void Update ()
{
if (restart)
{
if (Input.GetKeyDown (KeyCode.R))
{
Application.LoadLevel (Application.loadedLevel);
}
}
}

using UnityEngine;
using System.Collections;

public class GameController : MonoBehaviour
{
public GameObject hazard;
public Vector3 spawnValues;
public int hazardCount;
public float spawnWait;
public float startWait;
public float waveWait;

public GUIText scoreText;
public GUIText restartText;
public GUIText gameOverText;

private bool gameOver;
private bool restart;
private int score;

void Start ()
{
    gameOver = false;
    restart = false;
    restartText.text = "";
    gameOverText.text = "";
    score = 0;
    UpdateScore ();
    StartCoroutine (SpawnWaves ());
}

void Update ()
{
    if (restart)
    {
        if (Input.GetKeyDown (KeyCode.R))
        {
            Application.LoadLevel (Application.loadedLevel);
        }
    }
}

IEnumerator SpawnWaves ()
{
    yield return new WaitForSeconds (startWait);
    while (true)
    {
        for (int i = 0; i < hazardCount; i++)
        {
            Vector3 spawnPosition = new Vector3 (Random.Range (-spawnValues.x, spawnValues.x), spawnValues.y, spawnValues.z);
            Quaternion spawnRotation = Quaternion.identity;
            Instantiate (hazard, spawnPosition, spawnRotation);
            yield return new WaitForSeconds (spawnWait);
        }
        yield return new WaitForSeconds (waveWait);

        if (gameOver)
        {
            restartText.text = "Press 'R' for Restart";
            restart = true;
            break;
        }
    }
}

public void AddScore (int newScoreValue)
{
    score += newScoreValue;
    UpdateScore ();
}

void UpdateScore ()
{
    scoreText.text = "Score: " + score;
}

public void GameOver ()
{
    gameOverText.text = "Game Over!";
    gameOver = true;
}

}

2

They changed the way you load levels in newer versions of Unity 5, now you need to have this at the top of your script:

using UnityEngine.SceneManagement;

Then, you use

SceneManager.LoadScene(string sceneName);

To load scenes. You can also create new scenes directly through script now as well which was a much needed feature.