void OnOptionsGUI()
        {
            GUILayout.Label("\nPLAYER\n");

            if (null == Player.Instance)
            {
                GUILayout.Label("Player object not found");
                return;
            }

            //GUILayout.Label ("Jump speed:");
            //Player.Instance.jumpSpeed = GUILayout.HorizontalSlider (Player.Instance.jumpSpeed, 3f, 30f);
            OptionsWindow.FloatSlider(ref Player.Instance.jumpSpeed, 3f, 30f, "Jump speed");

            //GUILayout.Label ("Turn speed:");
            //Player.Instance.TurnSpeed = GUILayout.HorizontalSlider (Player.Instance.TurnSpeed, 3f, 30f);
            OptionsWindow.FloatSlider(ref Player.Instance.TurnSpeed, 3f, 30f, "Turn speed");

            if (PlayerController.Instance != null)
            {
                PlayerController._showVel = GUILayout.Toggle(PlayerController._showVel, "Show speedometer");

                //GUILayout.Label ("Mouse sensitivity x:");
                //PlayerController.Instance.CursorSensitivity.x = GUILayout.HorizontalSlider (PlayerController.Instance.CursorSensitivity.x, 0.2f, 10f);
                OptionsWindow.FloatSlider(ref PlayerController.Instance.CursorSensitivity.x, 0.2f, 10f, "Mouse sensitivity x");

                //GUILayout.Label ("Mouse sensitivity y:");
                //PlayerController.Instance.CursorSensitivity.y = GUILayout.HorizontalSlider (PlayerController.Instance.CursorSensitivity.y, 0.2f, 10f);
                OptionsWindow.FloatSlider(ref PlayerController.Instance.CursorSensitivity.y, 0.2f, 10f, "Mouse sensitivity y");

                //GUILayout.Label ("Enter vehicle radius:");
                //PlayerController.Instance.EnterVehicleRadius = GUILayout.HorizontalSlider (PlayerController.Instance.EnterVehicleRadius, 1.0f, 15f);
                OptionsWindow.FloatSlider(ref PlayerController.Instance.EnterVehicleRadius, 1.0f, 15f, "Enter vehicle radius");
            }
        }