Urgh...
I would really want to point out that, if you're aiming for this style of flash, you really have to focus on the animation a lot, to make up for the plot, or the lack of one but on this flash, I was expecting something interesting to happen, but it turned out to be a mediocre animation with a lineal and straight foward idea.
The movement of the characters was just the body parts for the characters tweened around to simulate what should've been done with a little bit of effort, but did nothing but a horrible, horrible attempt of making it slip by. I really recommend you leave sticks and bitmap tracing behind, since it does nothing but reduce the quality of the movie. Probably the worst part of the animation is how you tried to do first person view and just transformed the gun to try to make it look like it was really in front of the character, please don't do that, the gun really got flattened out and looked beyond terrible.
You shouldn't use the voices from the game, instead, getting a couple of voice actors seems like the best idea, since the dialogue was unrealistic at best:
-How you're doing
-I don't even know
-Awesome
-I owe you a big one
-Hey, no problem.
In the game, all the different options are scripted, so if Player 1 uses a dialogue option from the "Thanks" selection, Player 2 will respond with an option from "You're welcome", but they're all randomized and aren't something somebody pays attention to, but here, the whole ending, which is supposed to be the most memorable part of the flash, revolved around a badly written sentence.
Good luck with improving your flash... I guess.