It is created with Gamemaker by YoYo Games It isn't quite a realistic sim, but that was the closest, what you do is try to collect wind to keep the Wright Flyer airborn, also if you crash into houses, oh well. It is very cheap, but very fun.
This is the triplane in the game. This is one of the planes. I don't know why I am telling about the "Secret" planes, I guess it's because there are not many pictures to make of this game.