Unity5.3からのシーン遷移

Application.LoadLevel→SceneManager.LoadScene("hoge", LoadSceneMode.Single);

Application.LoadLevelAsync→SceneManager.LoadSceneAsync("hoge", LoadSceneNode.Single);

ApplicationLoadLevelAdditive→SceneManager.LoadScene("hoge", LoadSceneMode.Additive);

ApplicationLoadLevelAdditiveAsync→SceneManager.LoadSceneAsync("hoge", LoadSceneMode.Additive);