Scampz/Assets/Scripts/GameManager/GameManager.cs

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

namespace Scampz.GameJam
{
  public class GameManager : MonoBehaviour
  {
    public static GameManager Instance;

    private void Awake()
    {
      if (Instance != null && Instance != this)
      {
        DestroyImmediate(this);
        return;
      }
      Instance = this;
    }


    public void LoadScene(string sceneName, LoadSceneMode loadSceneMode)
    {
      StartCoroutine(LoadSceneAsync(sceneName, loadSceneMode));
    }

    private IEnumerator LoadSceneAsync(string sceneName, LoadSceneMode loadSceneMode)
    {
      yield return null;
      var player = GameObject.FindGameObjectWithTag("Player");
      LevelChanger.Instance.FadeAnimation();
      yield return null;
      var loadSceneOperation = SceneManager.LoadSceneAsync(sceneName, loadSceneMode);
      yield return new WaitForSeconds(3f);

      loadSceneOperation.allowSceneActivation = false;
      while (!loadSceneOperation.isDone)
      {
        yield return null;
        if (loadSceneOperation.progress >= 0.9f)
          break;
      }

      loadSceneOperation.allowSceneActivation = true;
      yield return loadSceneOperation;
      var cc = player.GetComponent<CharacterController>();
      cc.enabled = false;
      yield return null;
    }
  }
}