private Element popupElement;
private Element currentElement;
private SoundHandle sound;
public MainMenuAppState() {
nifty.fromXml("Interface/Nifty/MainMenu.xml", "start", this, new OptionsScreen());
//nifty.addXml("Interface/Nifty/OptionsMenu.xml");
nifty.getSoundSystem().addSound("titleSound", "Sounds/click.ogg");
sound = nifty.getSoundSystem().getSound("titleSound");