The creature 2d animation seems unpolished yet. I don't know if I'm right, but I got the impression it's newly developed, thats why they are so needy of monetary payback. Hopefully it will get more attention and sale in near future, and then the developers offer a not so limited free version with exportation feature like C2 and Spriter.
Would you share a gif or a video of some of your creations? I got really puzzled about this tool, and I'm curious about its capabilities.