Not TV quality, but quite good.
I love it when anyone tries to do something epic with Flash.
You have succeeded somehow, even though this series is far below par in terms of storyline. I will explain.
The storyline is actually good enough....but not above that by any means. The storyline is the same quality of most anime series out there. It is bland and isn't very creative. It has some mysterious elements, but then again, most anime series do.
The character designs themselves are very good and stylish. Were it not for the restraints in place because of Flash, this would be a very good series in that department. Compared to the videos here, it is above par.
The voice acting is generally superb. The sound quality is also very good.
I just don't like the fact that I see nothing very new here. It basically feels like YuYu Hakusho, except without all the spirit energy stuff. That lack of fantasy is actually an advantage, but ultimately makes it pale.
Good job anyway! 9/10, 5/5 for the awesome effort!