Simultaneous inputs

This page documents what happens on simutaneous inputs. After all, the goal of is to compile every Tetris detail known to mankind, so we NEED this.
* not possible on most controllers
* — moving should be processed after rotating.
* — unknown
* * — undefined?
* * — undefined?
* — immediately pauses the game. If already paused, it will process the movement on the first frame of unpausing.
* — immediately holds the piece with initial rotation.