haha thats pretty goofy lookin, but still cool. I like the text. Just color in the BG is really the biggest thing, but Im sure you were getting to that....
I know its a wall and negative space is really important, but I do think the render needs to be bigger, or duplicate the render and make them smaller to fill up the mid area a bitit's pretty good IMO, just a little 2 much emptiness on the left