This is a try-to-win-on-the-first-attempt game. The point of the game is to try to win on the first attempt. Or, failing that, to win in as few attempts as possible. You are not supposed to use "undo" or "restore" if things are going badly. (Though it is OK to use "save" and then later "restore" if you have to leave the game for a while. And it is OK to save the game as often as you like.)
Get it? Yes or no?