Wonderful Use of your own photography.. GOOD LUCK author

Great concept, but there are a couple technicals hurting the execution. The tilted mouse on the right is off-kilter to the rest of the image, looking like it should be falling over at that angle, and the mouse behind the glasses should be showing some distortion from the curvature of the glass - it would not be so perfectly aligned, because the glasses are curved front and back, not flat like a pane of glass.

Your shadows of the added elements also need work to match the contest source.