Woah dude it's the big papa! Nice use of browns and greens. I'd love to see this with a lot more detail, though I understand it's supposed to be a quickie.

The coloring and lighting is fantastic :) I love the green highlights you added, looks awesome next to the rest of the more subtle colors, reminds me of an old like military photo. AND the expression is great, got a nice mood to it all around. Very very good job!