It was an alright first submission
Well, this cartoon certainly isn't the reason that people go to Newgrounds, but it was fairly ok in some respects. However, I'm a bit suprised on why you choose to rate the movie with an M rating. From what I saw, there was hardly any real bloodshed in the movie. However, from an animation standby, it was "TWEEN-TASTIC"!
With my final remark, I would say keep practicing, and try to use less tweening.