What Tall Paul says is right on the money. Any light plane that I have flown ,that is the way things work. Once you get to the altitude you desire you level off and adjust your throttle and trim it for hands off level flight at your desired speed. If you give it more power you start to climb ,given things being equal. Every thing effects how your plane acts,how much you weigh,air temp ,and so on. Now,I am wondering just how a full aerobatic plane would act. I am thinking it would still respond to power change,etc., but not so touchy about it.