@Yumil1988About your lufia cover, i would recommend bring the boundary of your text box on the back more the right. (and indent on your first paragraph). When text is all the way against the edge of the cover it just ... looks wrong. I would also recommend increasing your font size to fill up more area on the back. (look to my F-Zero cover above to see what i mean)
great job on the cover though

About earthbound, just duplicate the character's body on the right side, flip it horizantaly and place it on the left. It's body is symetrical. Then merge the "new" duplicated half of the body to the original piece and blur together. And the background is a pattern, just duplicate that and patch it where needed behind the body. And poof ... the strategy guide was never there.