Please someone tell me it looks alright. I have lost way to much sleep over this
I like the original concept myself.
No brick. Too busy.
I would try different colors to see what I got. The 'black splatter'..maybe 'red' or 'grey'. Try changing the text colors and shading.
You're original idea was good. I even like the little page curl.
If you want a different background, something not as busy as brick try some vector railraod cars
or 2D vector buildings. Keep the background vector simple and one, maybe two colors at most and put your graffiti on it. You could go nuts with the colors. They don't all have to match.