it's ok, could use some detailing, but I'm not one to speak...
good texture for the background, stoke or self-fabricated ? either way, good choice...
I'll spare you some tips you already know, and instead tell you that you can put a low-opacity multiply layer over the background, and with a brown gradient you can make that background fit the light direction and shadows...
also, instead of drawing the shadows that fall off kakashi onto the background, you can select in-reverse the transparent area around kakashi, and with a multiply or colour-burn low-opacity layer, you can create an accurate shadow...