People may alter the shading and colors, but not alter the face or outline
That base is not mine, those are the rules posted on the link given. Take it for what you will. I'm guessing the eye shape, nose and mouth are off limits, as well as the outer line, but the coloring and shading are what you're asking about, I assume, so go ahead and edit those two things away.
And Hayley, I'm sure your satyr would have been bad ace!