Have you ever watched an older person play a game like call of duty? if yes then you understand how funny it is to watch them pull up on the controller like its going to make them look up or something and/or pressing all the buttons at the same time and hoping for the best. When making a controller you have to take into hand how many analog sticks and how many buttons it has. You also have to take into hand how big the controller itself is. Some might be too big and some might be too small and they could also have issues like the analog sticks are too close together.