Quite a few mistakes actually. I guess that's what happens when you try and rush art. I guess I will be re-uploading at a later point in time. (Sigh)
I love this idea, especially how the crayons are not new, they have lived a little. The lighting spoils the realism of the effects a bit alas, but still a wonderfully fun picture. Did you intend to have the names of certain colors facing forward or was that a random element?