I like the first one as well

The girl's left arm looks too small

I am having a little problem with the perspective. You are going for a "worm's eye view" right? The tilted ground plane is a bit confusing. Even if you are going for a bit of a tilt in the persepective, the trees should converge towards a point that is perpendicular to the ground plane (unless it is a hillside?). If you lighten up the value on the squirrel it should pop a bit more. it can still be in shade, but should be lighter than the tree trunk