Okay... It isn't bad, but a little bland. Especially regarding animation and artstyle. There are moments in which you animated everything better, and it showed (and sometimes clashed with the rest).
The climax scene with the demon is both a little unexpected (he just suddenly appeared in the princess' hall) and, quite frankly, anticlimatic. Is the princess the one who tells Nemo to raise his hands? Was that enough to vanquish a terrible demon bent on destroying humanity? What happened to Spent? Did he just disappear? And Aris? Why is the kid so nonchalant after shooting light beams from his hands?
There are also quite a lot of punctuation issues and the font could've suited everything better (it looked a little crude and huge at times).
Awesome reference and fantastic music score (thanks a lot Ghibli!). I feel this needs a lot of work, but isn't bad as a stepping stone. Keep it up!