I might not know much about sprite submissions, but what you have should be fine for uploading onto the main site.
Before you do, though, might I make a suggestion? Goemar mentioned something about the entirely black outline bothering him, so how about creating a colored one like this little something I put together?
Depending on which color the outline is supposed to border, you would use a color that is far darker than the shade you've chosen. Either outline works, but this is only a little something that would resolve the problem relating to the quills.
Before you do, though, might I make a suggestion? Goemar mentioned something about the entirely black outline bothering him, so how about creating a colored one like this little something I put together?
Depending on which color the outline is supposed to border, you would use a color that is far darker than the shade you've chosen. Either outline works, but this is only a little something that would resolve the problem relating to the quills.