this isnt bad. But i'd prefer a bit more realism in here. With the current angle of the sun, the ligthing on the child and the tree wouldnt be a silhhoutte it'd most definetly have some form of lighting on the top of the head and top of the tree. Also the birds look quite odd, and one seems to be blurred for no apperant reason.

Also the tree just looks off it would help if you changed the color of the silhoutte to a dark blue or somehting rather than black. Black is a bit too rich for this picture an extremly dark blue or something might suffice better.

The BG and grunginess is cool though. Not bad overall just needs to be thought out more.