The animation is very buggy, and the sound is very awful. I personally believe that the stick figure fight scenes are overdone, but for what it is, it seems to be poor quality. Your description says it's a test, and I'm of the persuasion that the portal is not the place for tests...it's where you put your finished products.
As good as it was, it bothered me that the guys kept disappearing and reappearing when they interacted with each other.
The sounds were kind of confusing to me.
The three stars are for nice smooth animation and a fairly cool fight scene.
This could be something better with more work, so there's definitely good potential here.
muito bom mas faz favor a ti mesmo e poe um loading screen nisso http://www.newgrounds.com/downloads/preloaders/
e poe os títulos e a descrisao em ingles.