I'm actually taking private art lessons so I know how the art work is done, the static character images and stuff are actually the easy part, what I want to know is how they manage that movement because it looks unbelievably smooth, in fact, almost too smooth for 2D which makes me wonder if they aren't mixing in some kind of other program with unity that specialises in that but maybe I'm just being too cynical.
I wonder if perhaps actually they did the visual effects in flash professional and then imported them into spine, that seems like a possible option.