Several problems I have with this.
First of all, the animation is way too choppy. Second, no music and only simple sound effects. Third, no plot, just a dude killing people. Fourth, it ended before anything got accomplished. It needs at least another minute of action. It shows the guy about to fight something and it just ends abruptly. It has some potential, but has quite a bit of problems too. I suggest making another madness thing, even though madness isn't that original. This is good for a test and for a first time animator, but not good for Newgrounds and for an actual animation.