Are Imzy Creature Images & Imzy Artworks Copyrighted???

I am wondering if the Imzy creature imagery is copyrighted, and as such off limits for use (by people other than the artist) in Imzy articles.

I want to make it clear that I have no interest in profiting from the use of this art (even by way of Imzy Tips). Furthermore, I would only use any such art on the Imzy site.

I'm not much of an artist myself, so my drawings are very simple... which is fine for many things. I sometimes assume the role of an anthropomorphic Malamute... and illustrate that character with stick-figures. The other day I got the idea of inserting my stick-figure Malamute into an Imzy land image I found online... as a way of illustrating "Mal's Discovery" of the new and somewhat magical Imzy land. I can show you an example of an image I "doctored" (in PS) if you like, so you can see the sort of thing I am talking about. But I don't want to post that image until I know it is not a violation of Imzy policy.

Cheers, Mal, AKA Steve Ford