Looks sweet.
~ Animation/Graphics ~
Even though it's stick figures you did a really good job on it all around. Smoothly drawn and neatly drawn figures and also very smooth animation all around. There isn't anything to critique here at all.
~ Story/Content ~
Really no story or plot except for a couple of sticks fighting over something. Perhaps a little introduction so we know why they are fighting and a little background story on both of the characters would have made this a little better. You know us picky viewers :P we like to know why people are beating the shit out of each other.
~ Audio ~
The music that you picked worked really well with the animation and you did a great job syncing the audio up. You also did a good job with sound effects.
~ Overall ~
In my opinion the only thing lacking from this submission was any sort of plot or reason for fighting. Without a reason or anything like that then it's just your generic stick fight with good graphics.