Hmm on the one hand it's a fun intro, with plenty of variation and characters to bring it to life, but on the other hand it really doesn't build up an atmosphere... the style feels sketchy, anatomy disproportionate, and the transitions somewhat basic but... I think the the one thing that's really missing are sound effects, and voicing, with a little 'yah' as she attacks, or a 'swoop' for a transition, or some kind of rumble and menacing background sound as the giant towers above her... if the sound helped build the atmosphere then the animation quality would be alright! With the real thing maybe all of that'll be there though. :) Looking forward to seeing what this turns into.
-cd-