ooo, Get ride of that compiuter up it the corner. It has nothing to do there at all. You must change the "background2 colors. The black and white looks like it is the foreground, You dont want that. I would try to play a little bit with that blue line that comes out of the compiuter. Try to bend it upwords and make it go all the way to the left corner at the top. hmm
Sorry dude. It´s not working at all. I have no idea how to repair that thing. I would make a new one. And remamber the color palet. It you deside to go for a rainbow with so many strong colors. You cant but it on a market black and white background. Go for a White or change the colors to somethink like realy light green og blue. And the main thing. What is the main object on in ti? Is it the guy og is it the compiuter. Those to things are the same spot on the pic and they are the same size if ou understand it. Make the main thing BIG. dont worry that it will seem unnatural. Thats what Graphic design is all about. Making things different. Good luck