@Bright: There's a weird thin line on Mario's hat. Also I don't think the text should've been blurred out. The text shouldn't take the attention off the focal point (Mario) but blurring just made it harder to read.
@Gryphon: Dawwwww what a cute raddish. I personally don't like raddish, for its bitterness. The signature is actually really good for the first one. This is really a personaly preference, but the border should be ontop of everything, even the light source.