It doesn't really have any flow to it, or depth. The stock already has shadows on it. you should add a light source to compliment that. What program did you use for that?
Try to work on your text, the background is a bit much for me, and try not to have your render squished up against the side of your canvas like that. It is a little bright for my liking, as well.
if you use a fractal you should set it to screen or maybe even color dodge and lower the opacity until it fits your liking. The text could use improvement and the stock is too bright. Tone it down and add a brightness and contrast layer. As you said it was made mostly in ms paint that's pretty impressive. I'd die if I had to do that.