I memorized the most effective combo at the time, and just did it while putting all my focus into the bottom screen. It's really not hard. You just suck ass at it.oh please. either you tried playing them both at the same time, or you constantly focus on one or the other and switch back and forth, or you say **** it, and not bother with the hassle and annoyance of doing either option and you abuse the game's mechanics for superior results.