Good fun...EXCEPT...
Look, it was a great game with a lot of potential. Cool unique idea for gameplay gives it a thumb up. But There is one massive flaw with the entire game, and that is that there comes a point where it is completely based on luck. It doesn't matter how points you have put into frequency for any bomber, you can even have the frequencies completely maxed out. There will always be a chance that not a single plane or car will show up for a full 5 seconds, purely because of luck, and there's absoutely nothing you can do about it. It's just frusterating as hell knowing that I can lose and it could have nothing to do with how well I played that game.
Suggestion: make it so you do not lose fuel in mid-air, which makes sense both in realism and gameplay mechanics (it's ok if people make it through the first few levels easily). Also, a vareity of points and combos that a perosn can achieve would be nice, or rather, the higher up a plane is when you hit it, the more points/experience that hit is worth. Otherwise there's no strategy to hitting things, it's just "hit as many as possible". That will add mroe depth to the game.