A good game with room to grow.
Wow! Good job on this game. You have obviously spent a good chunk of time building this and it's really looking great.
I did notice a few things that you might want to check on:
1. It's pretty slow on older machines. I have a PII 300 (I know, I know it's completely ancient and obsolete) and even in low quality the game speed was pretty laggy. Must be lots of Actionscript beng run here. Perhaps you can optimize it some? There will likely be other people on slow machines who will be less forgiving.
2. Bullets tend go through the ground. Although that can be advantageous, it will also detract from the game somewhat in terms of people's expectations.
3. I noticed that you can keep killing the dead soldiers. Maybe you should fade them out and move them off screen or removeMovieClip() them.
4. My arms and gun didn't keep up with my body very well when jumping. They tended to lag behind a little bit so I looked like Plasticman a lot.
5. Maybe this was the end of level, I'm not sure, but after killing the helicopter, the world ended and I fell off into nothingness ... and then appeared at the top of the screen. Kinda odd.
Don't take all this as bad news. This is a great game that I will have to play on my faster desktop when I get a chance. You have really started something good. I hope you keep working on it and complete it soon. You've done a fantastic job thus far.