A couple things I noticed.
First off, this is a pretty good game, I enjoyed myself, but there are a couple things that might warrant attention...
-First, I don't know if you intended for the enemies to not hit you right when they ran into you, but you might want to tighten up the time between being in range and them hitting you. I was able to run circles around even the most large groups of enemies with ease, and they didn't do a thing. This brings me to a second point.
-I was able to exploit this feature and round up all of the enemies into a small area, and then ground pound/body slam them all without fear of being hit, ever. It was fun, in a cathartic sort of way, but if you don't want that in, fix it.
-Also, and this one is pretty weird, when I bodyslammed on top of a shotgun, I wound up extending the impact part of the body slam for the duration of the shotgun time. The effect was basically me laying there prone on the ground, and enemies walking into me and dying. Fix it if you like, or don't, I thought it was funny, so I wouldn't mind it being left in.