Not bad at all. Did you use GameMaker? Bacause I think I've seen/attempted to make a game like this from a GameMaker tutorial.
There are a few little things though:
- I'm guessing you will be adding (or could add) more types or planes but thats just minor expansions.
- The main thing is that when you die you respawn at exactly the same spot, if there are mroe planes in that area you die as soon as you spawn. Maybe adding a short invinsible periode is a good idea.
But don't get the idea I'm all negative about it