Sorry, I couldn't understand the proposed behavior. Can you elaborate? For now, it works this way: when you launch the app (by clicking the icon in the launchers view) it disables the screensaver and shows a notification. When you click the notification, it enables the screensaver and quits the app. As you see, there are no windows. Might you think it is inconvenient the notification stays there while the screensaver is disabled, but that avoids you forget it's disabled and burn the device screen.