Nice

Cool sounds! I also liked the animation.

well...

You put effort into it but it misses many ingrediants. Such as the loading screen and the play and replay buttons. ( there are tutorials in the downloads section of newgrounds. ) anyway no. No stars.

Not very good.

Seriously, I hate it when people go "this is my first flash ever vote 5 plz cuz it's my first flash"

Who gives?

This flash was very, very boring.
3 because it looks like some effort was put into it, but it was overall quite bad.

meh

You should rly throw in a menu, preloader or intro to easy into the action. The attempt was good hence the 6 rating so maybe you should practice a more fluent style. But great first try!

Meh...

Some tips-Try to develop at least a rudimentary storyline, because as of now, you just have some guy on a flat plain shooting into the ground for no reason, and then getting owned by some guy that's a different color.
As of now, there is not enough filler action. Try to make them combat a little more Kung-fu style and THEN have one of them dominate. If one of them just wins through the whole thing, it becomes quite boring.
You didn't associate us with either one in particular. We don't know which one is the hero.
And I dislike the completely bland and flat battleground.

All in all, While this is decent, and definitely suitable to newgrounds, you need a LOT more effort and time to make people like your work.