At the beginning of your round of Marble Madness, you have two choices for control, 90° and 45°.

But what do the choices mean?

Turns out they're referring to the orientation of your controller. 90° is the standard way you'd hold it, with the cross pad looking like a plus sign.

45° means that you rotate the controller slightly so that the cross pad looks more like an X. The idea is that since you'll be making lots of diagonal movements in the game, it'd be easier to hit one arrow than two.

But I never could make the 45° control work very well, so I stick with 90°.