<ui>
     <button label="Singleplayer" halign="center" valign="center" pos-x="-200" pos-y="-110" width="400" />
     <button label="Multiplayer" halign="center" valign="center" pos-x="-200" pos-y="-35" width="400" />
     <button label="Settings" halign="center" valign="center" pos-x="-200" pos-y="75" width="400" />
     <button label="Back to desktop" halign="center" valign="center" pos-x="-200" pos-y="150" width="400" on-click="quit" />
</ui>