listenGoToMenuButton method

void listenGoToMenuButton ()

Listens to the 'Go To Menu Button' which directs the user to the main menu page 'Level Overview'

Implementation 

void listenGoToMenuButton() {
  querySelector("#button_to_menu").onClick.listen((MouseEvent e) {
    this.showLevelOverview();
    context.callMethod("requestiOSGyro");
  });
}