Eh... atleast it's frame by frame...
Ok, you NEED to fix up your character design. If you don't use the lining tool, try zooming 200% and use a 50% smooth rating for your brush, it should come out much smoother.
The animation needs a plot, not just killing. When someone says "OMG IT'S YOU!" and I don't know who 'you' is... it gets kinda annoying.
Try harder, develop a plot and work the animation.