This might be alternately titled, Break Doodles with Color.
I like this brachiosaur but I think he oughta be more imaginative or exaggerated, despite his already fantastical anatomy. For instance, I could've made his neck very lo-o-ong. Even as is, I think his neck may be proportionately shorter than a real brachiosaur's neck'd be. Also, a brachiosaur's feet seem to me rather small, so I could suggest that in my drawing.
The overlap of the figures could be improved. As is, the tip of the brachiosaur's tail reads very much like hair from the cavegirl's head. The purple color's the only thing to suggest it's the former.