Great app! I really like the challenge in such a realistic manner, including the terrain, noise abatement areas, weather, etc. I purchased this yesterday and already scored as high as a master controller. Then when I paused the game on my iPad, did emails and such, I returned to the game to find my progress erased! It took me back to the home screen! Please fix so it saves. Also, the approach, cancel approach, and direct exit button should be larger or moved higher. I keep hitting the alttitude "up" button. Very frustrating especially when you have to tap down many times to correct it. Fix these and this game is easily 5 stars!!!