So I did a little experimenting with mission 1, the new one, it seems there are three fat guys, two normal along the left side and one gray at the end in that level but only in the first complete run of the level. So when you complete it the normal fat guys are no longer there, meaning that if your starting the game for the first time its best to just run to the goal and then do the mission again as this level seems to have layers of bs built into it.