The simulator will come up with things that will happen, it will also give you a small description of the aircraft, or you can put your own if it's a made up aircraft. The eras can range from WW1 to the modern era. You can say "new fight" and the AI will "reset" the sim, allowing you to choose another craft, and it will choose a random enemy craft or squadron you fight against The fighters you come across are hard to destroy, and can easily avoid missiles and take some decision making to triumph