A nice twist on an old favorite
This was a very impressive project, especially coming from someone as young as you are. The animation is off to a great start and the plot is nicely woven thus far (though leaves some questions that will hopefully be answered in future episodes). The best part, however, is the voice acting -- uncanny! How did acquire the people to imitate the voices so darn well?
As a long-time TMNT fan, this was a breath of fresh air. However, I did think the violence was a bit overdone, because 1) the turtles, traditionally, have always tried to avoid fatal blows, so this seemed to conflict the characters we all grew up with and 2) it seemed, in parts, just to be bloody for the sake of being bloody. I do think adding some blood to make it more realistic is a good idea, but don't go over the top.
All in all though, this was a VERY impressive piece! I'm anxious to see more episodes, so keep crankin' 'em out!