The shield bobbing motion seems out of place, I imagine it would be a smoother, possibly circular motion. The legs should have some noticeable change too, they look completely stiff at the moment. (Also, it seems like a pixel in his shorts disappear?)
As an additional suggestion, in the future it would be easier on the eyes if you changed the background color to something more in the middle (like gray or a low saturated tone) because the sword and the hand holding the sword are very bright compared to the black used in the body.
As an additional suggestion, in the future it would be easier on the eyes if you changed the background color to something more in the middle (like gray or a low saturated tone) because the sword and the hand holding the sword are very bright compared to the black used in the body.