Fun, but needs work.
The music was cool, though I'm not into techno. The game was fun, but the first level pissed me off. Maybe you could lower the HP of the birds, are they Angry Birds? Haha, bad joke. Anyway, the graphics are bad, which is the least of my concerns, you can fly over the barriers that won't disappear until all of the enemies are killed, which is a major problem in making it very easy, and finally, it's too short. I know that you said that it's incomplete, but it should have a boss fight after level 2 at least.
Overall, it's not a bad try for your first helicopter game. I'll give you a 2/3 for the music and a 4/5 for the fun, and 1/2 for the graphics.