I think it's fine to have a reptilian tail. It's a fictional demon-monster after all.
This is great ! Only thing I would add is, the third head from the left seems to me that have no ears. I would add that, you still have time and I think it would look even better. Other than that great work ! Keep it up ...
I like the animation on this, but I agree with the reptilian tail comment.
Thanks!
@jalonso: Yeah, it definitely looks more reptilian. A short and simple tail looked a little too boring to me when animated. I seperated it a little from the body via darker colors and an outline now, thanks for the tip!
@w4rlock: It isn't, I simply experimented with subpixelling due to the restricted image size so that it still looks fluid.
Great looking overall tho the tail has a more reptilian look, movement and flow than a mammal would.
great piece!