I wonder why they decided to go with traffic lights. It doesn’t really map at all to the things you want to express on a desktop OS. Yellow=hide car but leave it running, and red=… destroy car?

The funny thing is, it could almost work on something like iOS, where (if I understand correctly) focusing away from an app suspends it typically. So that could be the red button. I’m not sure what yellow should be. Maybe put the app into a sort of non-interactive mode where it stays on the screen but doesn’t do any processing, just queues up notifications.