Each of the 4 buttons has a unique introduction depending on which button is pressed in prior to the audio starting. There are also 4 different first questions on each of the tracks, but you would only hear the other three questions if you initially fail to follow 2-XL's instructions to press button 4 when he tests you to see if you will do what he says and instead have buttons 1, 2, or 3 pressed (after which he of course scolds you for not following his instructions). This is not the only program with this oddity - on Batman: Carnival of Crime, there is a location the story will start in only if you push button 3 instead of answering yes or no - after 2-XL scolds you for not following instructions, you get a unique location start...sort of like finding a hidden secret place in a video game you find by doing something out of the ordinary...normally not following instructions can mess up the entire program, but in that case you get a prize.