The Jump animation is quite funny as well. Well Brainbucket does that. All in all the animation is adequate but no more. In game play the only thing that stands out as very wrong is the stand animation which consists of a rather alarming twisting motion and which points in the wrong direction. I'm only giving it 1.5 star.
Animation takes time.
The skin looks good and closer inspection reveals a nice efficient 256x256 bitmap. That could be lower. A little time spent laying out the skin in an efficient way could have increased the sharpness of the skin considerably without any cost in performance. This is an understandable problem though. My first models have exactly the same inefficiencies.