It was a good decidion to extent the roof of that cave, makes for a nice scenario where your CAP designs peers out into the outside world. The bottom of the image is well done in terms of shading and lighting, with the exception of a cut-off reflection on the middle rock. What I'd like to see improved further is the edge and plants in the image's top-right part. Despite the distance, there should still be a somewhat clear line between the sky and the rest, with less blue tones invading the solid ground.
The water could also be more similar in color as the sky, but not identical. Or maybe the sky's blue could be less saturated, either way they both feel rather conflictive in terms of the viewer's attention, rather than working towards the same goal.
As for the deer boobs, I ....... really like the lighting. Yep. Did one of you make the lineart with the other doing the colors, or was the art trade more complex than that?