This was awesome.
The character design was great, everything moved very fluidly, I loved all the blood & gore, and how sick & twisted the whole thing was.
The one minor thing I could criticize about this is how some of the movements looked like they were moving just slightly too slow. The motion was fine, but the speed just seemed off a tad. (A few examples of this would be the eye-popping animation at 0:07, when the woman gets knocked back at 0:37, or when the dude jumps out of the way of the ball at 1:24). Not sure if the intent was to make them appear as though they were moving in slow motion, but I feel the speed change wasn't drastic enough to convey that, and instead, those moments just appear to be... a tad off.
These are simply a few minor nitpicks in an overall great looking animation, though. Great stuff! Easily 5 stars! :D