The quirk of P.O.W. Rescue is that one gets 15 minutes total (of combat time) to complete all stages, and can retry stages as many times as necessary in order to reduce the time spent or score a win altogether. In the case of having reached the end of the path or running out of time, the player needs to "Restart" (which they can once a day; Restart refreshes at 0400 hours server time). In fact, restarting can be done voluntarily at any point, for example if the player encounters a deck they cannot beat.