I tried to make the blur. I'm not sure how that worked out; sometimes it seems fine, but sometimes I see that lone frame of an arrow appearing out of nothing, which is not very good.

Oh man, that walk is so painful and pitiful. Great job.

One criticism is that the crossbow bolt moves too slowly. Instead of animating it moving, you could use 1 frame of motion-blurred streak to show it flying in to pierce the spearman; it will look like it really hits him hard enough to knock him over.

This is good! I think you could use a little space between animation cycles though. Maybe a fade to black or something.