Well
A great effort, and this probably took a buttload of time, and there's some people out there that will probably love this. Unfortunately, I'm not one of them. I know how easy it is to do shape tweens with frame easing so it takes more than black & white shape tweens to impress me. Also, the movie was frightfully slow-paced. The plot was decent, but the story could have been told in a fraction of the time and been much more interesting (of course, I say that about most portal flicks because it's true of most of them).
Also, in order for a plot to be engaging, it has to have some sort of intriguing challenge for the protagonist, and getting up stairs just seemed boring. But that's just my opinion, I'm sure some people will really dig this.
-Ben Spurgin