Mystery of Time and Space/YMMV


 * Seinfeld Is Unfunny: Nowadays, with many beautifully-rendered and complex escape-the-room games out there, MOTAS looks rather dated; its puzzles, while not easy easy, wouldn't be called "hard" by seasoned gamers the way it was called by some gamers in the past; and its plot is rather sparse compared to some of these games.
 * That One Puzzle: The green wall. If you don't know the trick to doing it, you'll probably be fiddling with it for a long time.