private void OnSingleplayerGUI()
        {
            EditorGUILayout.Separator();

            EditorGUILayout.BeginHorizontal();

            if (GUILayout.Button("Build for Singleplayer"))
            {
                if (!Directory.Exists(_buildFolder))
                {
                    SetBuildFolder();
                }

                if (_buildAndRun)
                {
                    BuildScripts.BuildAndRunSingleplayer64(_singleOnlyScene, _buildFolder, _devBuild, _buildTarget);
                }
                else
                {
                    BuildScripts.BuildSingleplayer64(_singleOnlyScene, _buildFolder, _devBuild, _buildTarget);
                }

                GUIUtility.ExitGUI();
            }

            if (GUILayout.Button("Run as Singleplayer"))
            {
                BuildScripts.PlayAsSingleplayer(_singleOnlyScene);
                GUIUtility.ExitGUI();
            }

            EditorGUILayout.EndHorizontal();
        }