We do not call it game, we say simulator :)
You need some kind of understanding of navigation and each aircraft has his own flight-dynamics so it is much more than a game. Here you see us flying live:
http://mpmap02.flightgear.org/?ll=62.57974314015158,-960.9572240300292&z=4&t=s&fg_server=mpserver01:5000,mpserver01.flightgear.org,5001&update_interval=5&pilot_label=always&icon_mode=normal