using UnityEngine;
using System.Collections;

public class LoadingLevel : MonoBehaviour {
          public int level = 2;
          private AsyncOperation async;
          private bool once;

          IEnumerator LoadScene() {
              Debug.Log("Loading... ");     
              async = Application.LoadLevelAsync(level);
              while (!async.isDone) { yield return null; }
              yield;
              Debug.Log("Loading complete");
          }
              
          void Start() { if (!once) { once = true; StartCoroutine(LoadScene()); } }
          void Awake() { DontDestroyOnLoad(gameObject); }

          void Update () {
              if(Input.GetKeyDown(KeyCode.A)) {
                  StartCoroutine(LoadScene());
              }
          }

          void OnGUI () {
              GUI.Label(new Rect(10,10,300,20), "Нжмите А для продолжения");
          }
}