Red Baron Lives Again!
I used to play a game like this a longass time ago on my antique IBM. The funny thing is that it ran better on the 8088 processor than it does om my P3.
Clean it up, add some annoying sounds and loosen up the concept just a little bit. You have this silly intro leading up to a serious game, what the hell is with that?
Also, find a way to speed up the dying/playing again process, I finally quit because of that taking so long.
Get rid of those lameass missiles and just make the gun into a machine gun, allow people to kamikaze their wounded plane by having it fall at a certain rate but maintain some control, and above all:
Make the game sillier! If you have to make the enemy plane giant turkeys turning out to help the beef industry against the Colonel, do it! The game should be sillier and faster.
Anyhoo, it's a good game so far, and you have the basis of something really special if you do it up right.