You're bricks look unnatural and just saturated on top of a black/white brick pattern. Did you use a real brick pattern or make it by hand? Real looking bricks (cuz they are real) http://ftextures.com/textures/red-bricks.jpg
The bricks that are there however are much smaller in the reference over what you have. Your bricks are way too big. The red is too saturated too, and needs more brown over red.