Fantastic work done here!
This flash has done an excellent job at "Mickey Mousing" here on NewGrounds. It's probably the second best I've seen with that. I find it astonishing that you happened to use Celtic Music here in this animation, which suits the entire theme of all your submissions' atmosphere. Creating an entire WORLD of fantastical creatures that are absolutely flawless is something that not many can do.
It very well states in your explaination that you never intended to have some sort of deep storyline to go along with it, so I don't think it's necessary for me to say anything about that.
The use of nighttime light and shadows, plus your keen eye for detail, even on the tiny YuYu is brilliant. Given the fact you took some serious time to do this shows your commitments to what you do. Your artwork is absolutely stunning! Was this all done by mouse? Hand and then vectored? Or was it drawn on a tablet? I'd like to know.
I hope to become as good as you are in your abilities because that is something that will not be easily accomplished.