Great work! Yeah, the BG's a bit dark, you could lighten it up a bit also, the texture used on the renders are exceeding the area, rub the yellow/green texture from
his right shoulder. There is a small blue dot in the A also the the blue lightning under the text isn't looking good, it looks erased from some pars. Coming to the render, doesn't blend well IMO. KIU!
Just lighten the BG a bit and it will be perfect.