Really nice....But: the legs look as if they are supposed to be hidden in the grass. But they have to be longer that where they stop. I say that because it looks like they stop at their knees. Unless they just have really fat ankles. Otherwise the animal is standing in the ground up to its knees. In which case there do not seem to be any holes for it to stand in. Basically, what I am saying is that maybe you should give it a background in which it has tall grasses to stand in. Or finish its legs and raise it up in the image.

Other than that, I kinda like it. It's cute.

Well I have attempted to fix the longer leg problem. Does it look better?

Nope.

lotsa fun

You might try blurring the aquaduct a bit. The buggy and sand are noticeably less focused.

+1 on what mossyB says, otherwise some nice blending

Pretty gigantic buggy compared to the scale of the aqueduct...

looks a little out of proportion

desert storm with two flat and happy soldiers, there was war...

These two soldiers knew they were in a war. They were smiling at the cameras for their families back home. This was BEFORE the internet.. when letters were still sent out in regular mail and they didn't know when the photo would get home, but at least their families would know that at the time the photo was taken, that they were ok..

Nice effect with the skin texture.

might look a bit better if you hid the texture as it runs over the body seams and edges of the openings

I know I'm kinda late but remove the shadow of the smoke IMO.
Nice job author, Good luck