This movie has nice animation, interesting characters (if somewhat two-dimensional) and an interesting story all the way through until the very end, where we find yet another film that leaves the audience trying to guess what actually happened and what point the director was trying to get across.
There are several good aspects to this film. The story is decent most of the way through. The animation is fine. But the plot and story line are flawed, presenting bits and pieces but never succeeding in telling the entire story. The steel factory is central to the story but never explained. Why the town decided to follow a guy who was without doubt a loon is beyond understanding. And justifying locking a little girl inside a factory for years is simply insane. So much of the film makes no sense.
Some may feel they understand what happened, but in reality they'd be adding their own 'truth' to an incomplete plot. And while two or three different "theories" are presented throughout, it's difficult to understand the reasoning behind much of what goes on.
All in all it was an interesting but unsatisfying film. The writers and directors leave it to the audience to figure out what story they're trying to get across; that's a stunt that very seldom works. The overall low rating here (as of this posting) would indicate the majority of the viewers feel similarly.
ADDENDUM: When I first posted this review I found many other reviewers agreeing with these observations (in their own reviews). Shortly after this review suddenly-- within a very few days-- we see several negative ratings on any critical post. So one might suspect significant crew and family response rather than legitimate viewers. If a film requires such manipulation-- it really doesn't stand on its own merit.