State ID (see constants)
Instantiated Stage to associate with state ID
Optionalstart: boolean = falseif true the state will be changed immediately after adding it.
set
state
class MenuButton extends me.GUI_Object {
    onClick() {
        // Change to the PLAY state when the button is clicked
        me.state.change(me.state.PLAY);
        return true;
    }
};
class MenuScreen extends me.Stage {
    onResetEvent() {
        // Load background image
        me.game.world.addChild(
            new me.ImageLayer(0, 0, {
                image : "bg",
                z: 0 // z-index
            }
        );
        // Add a button
        me.game.world.addChild(
            new MenuButton(350, 200, { "image" : "start" }),
            1 // z-index
        );
        // Play music
        me.audio.playTrack("menu");
    }
    onDestroyEvent() {
        // Stop music
        me.audio.stopTrack();
    }
};
me.state.set(me.state.MENU, new MenuScreen());
associate the specified state with a Stage