Nonsense? (May contain spoilers ;))
It is :D But it's great nonsense! Damn i have the feeling it'll make my day.
It's a hell of a surprise - first you see a cute-like scene, then the unexpected act of jumping; but as soon as you see the sabre coming out of the belly you just sit there stunned wating for what happens next xD
I would recommend this flash for breakfast or similar, for the jazz music (hope I'm right) creates a chill-out ambience and since the movie's
smoothly-animated it's also a feast for the eyes.
I sincerely can't imagine how you made this plot up, but I appreciate it.
It is more fun to watch than most movies with "hardcore logic" xD
Ultimately, creativity rocks.
One hint: I liked the ending very much, and how you employed the music (that it loops at the end), though rather than the turtoise-outro I'd prefer a continuation of the black&white slideshow with credits (adding music credits, "thanks for watching" and similar with further images), showing not only the turtoise, but also some other "animalic" homes plus fading the music out, because in the end the cut was too abrupt. I loved the b&w style image with the flying dragon (dinosaur?) and found it a pity it didn't go further.
But that wouldn't influence my over-all impression. You deserved your 5, and now the NG community will expect more offspring :D