Sorry to hear the project didn't work out as planned, Thujon. As I mentioned before, these are pretty small thumbs, but really if you are able to get strong images going at this stage, it should still translate over pretty nicely for when you decide to enlarge them to start detailing towards a finished piece.
It looks like with many of these, you really had a clear vision of what you wanted and just went for it. I particularly like the rendering for the purple-bat, and also the one with the front on view. The goblin as well. Good stuff!
