Game must begin in Maze 1.Players are free to set both Difficulty Switches in a position of their choosing.The Left Difficulty Switch controls the number of chances players begin with. "A" = 5 chances; "B" = 9 chances.The Right Difficulty Switch controls the speed of the Alien Stalker. "A" makes him fast. "B" slows him down.Note that the game's final scoring takes the difficulty settings into account. Playing on a harder handicap rewards players with additional points.