<panel size='400' color='0' interval='1' context='menu'>
    <button onclick='menu.page="new_world"'>@New World</button>
    <panel id='worlds' size='390,1' padding='5' color='#FFFFFF11' max-length='400'>
    </panel>
    <button onclick='menu.page="settings"'>@Settings</button>
    <button onclick='menu.page="content_menu"'>@Contents Menu</button>
    <button onclick='core.quit()'>@Quit</button>
</panel>
