Your smudging is a little messy and blury and the text is a bit hard to read. The sig could probably also be cropped a little bit so that there is more focus on the sprite, and less effort to fill the mass amounts of emptiness.

That's probably the hardest thing about Sprites, but the easiest way to achieve this is by creating a scene. (eg: create a wave behind the character).

Still it's a good job, and Sprites ARE the hardest sigs to make.