I think you're gonna hate me for this review.
well this was a really awesome cartoon.
I really don't see any defects, and, as i'm sure lots of people told you, the animation is great (its unusual on newgrounds to see that quality), the character design is fun, the backgrounds are amazing, colors are very well picked ..... well well, I would almost say it's perfect.
BUT, and there is a terrible but.
I felt like I was watching a vinnie remake (a top quality remake, of course, but nonetheless). I don't really care whether this is your universe and you made it up before vinnie made his cartoons, or any reasons that could be behind it : I'm not trying to talk about plagiarism. It's just that creativity lacks a lot behind this movie.
The creativity in the style, that is (I'm sorry to say and I know you'll hate me for it) very anime. The creativity in the characters moves,and the whole cartoon itself was completely the same as the stuf you could see in vinnie's work(one of his early work had a girl and a guy race in some of his imaginary universe).
Anyhow, I wanna point out this is extreme quality, because I know I havent created any work that could compare to that, and I'm not trying to say I am more creative than you are, because it would be a lie. It's just that it's .... too bad ? to see so much talent put into something that really did not feel new at all, and it lost a lot of its magical touch to me because when watching, I felt I already saw it before.
Keep up the good work though, I'm looking forward to more of your animation, because it still is great witnessing skills such as yours. And I have hopes you'll find inspiration for something more unique, and appeal viewers with originality.