Amazing!
The detail of the man standing on the cliff is great, and really contributes to the rest of the picture, and it adds an air of mystery to the whole thing. I like the way the lines are drawn, and the way the cliff itself is shaded.
The only thing I can really think about that isn't quite right is the dinasaur seems so out of place, but I suppose you had to include it, so I didn't dock anything for that.
All in all, a great piece of work!