Almost perfect....
First off, the good:
This was an innovative idea. Good graphics, but not too good to overload an average system in Flash. Weapon choices, making it a game that requires more than an itchy mouse finger. Resource gathering was, interesting. It didn't crash/die on me, which is always a plus. I liked the fact that you could run out of ammo, see itchy trigger finger comments.
Now the could use improvment:
The dragon handled poorly, particulary when you were in a hurry to get somewhere.
There were only 6 enemy targets, and 4 of those (control center/factory, attack/repair helis) were just clones of each other.
Suggestions:
More enemies.
Put a numeric value on the gas vents as well as a bar gauge.
Maybe make a larger screen reliative to the dragon? It seemed more than a bit cramped.