Ok
My main complaint was that there was not much replay value. When you hit Kevin in the face he becomes a skull, but if you hit him in the body his appearance doesn't change.
For the slow: The best way to win is by using jabs, all the time. (this is also a complaint, since the other moves were relatively weak because they are slow--you can do 5 jabs for 8 damage each in the time it takes for you to do one uppercut for 14 damage) If you really want to kill him fast then keep moving the mouse slightly to the left of the center of Kevin's body/face, then click, then move slightly to the right of the center, than click, and so on. That way you can pummel him with both fists at the same time which is a lot faster than just hitting in the same place with one fist. To kill Britney you have to hit the baby out of her arms and then hit the baby or her a bunch of times while it's still in the air so that she drops it.
Writing that made me realize that this game is kind of sick.
Did Adam Phillips really animate the urine, or was that a joke?