Because of the game's spacial limitations, the puzzles come to you in this one. Each puzzle must be solved, often within a certain number of turns, if you are to survive. Luckily, all of the puzzles make sense and have intuitive solutions, though in some of them it's not clear what the deadly moment is until it arrives, which means a save-and-restore tactic is necessary sometimes to overcome the strict time limit. Overall, Persistence of Memory is one of the better one-roomers ever written, although it feels as if the designer felt more constrained by this limitation than challenged to create ingenious puzzles to overcome it. Recommended for the high experimental quotient that almost paid off.