John Romero takes you in, shows you how Doom plays, and then takes you on a wild ride through blinking lights, secret passages, and monster closets before sending you via teleporter to the next stage. Perhaps that's what I like about this mapset the best - its attempts to defy expectations with every level while simultaneously avoiding the aura of sheer contempt for the player that often comes with the territory (though some players will always fly into a frothing rage at things like crushers, which I find bemusing at worst).
