I agree with Teo here. The fact of the matter is, the game at it's core base level is a players 1 run. While the players X command is definitely a part of the game and gives a challenge/modification to the game, P1 is the absolute base. Everything else builds off of p1. That is why it is the main run shown upon entrance. Not because its fastest or not because its "easiest" or popular. Because p1 is the very core and base of the game.