It had something
This seems to be an 'ok' for a pilot. Personally, I thought it was pretty good. Although abit cliche, I'll give you a decent score. As for the animation, it was almost all tweened. Practically tween-rapped if you ask me. Tween tween tween. However, you DID use it effectively, and that gives tweening a good name. So congrats on that, the dialogue saves the rest.
I'm going to sound like an old people but, is it a little too much to ask for a little frame-by-frame now and then? I mean, it may not look as great as tweening AT FIRST but PRACTICE makes huge, and I mean huge, improvements. Frame-by-frame is also so much more vastly dynamic than tweening. And it looks more professional to show yourself trying something hard.
I'm rambling on like an old people aren't I? Sorry, wanted to get my point across. Hope the series goes well! Don't steal ideas, and make some kick-ass animation! :D