I mean, plenty of ideas come in mind, as to what the movie was about or what messages it was trying to pass to us, but writing about them would be pointless since you (the viewer) will arrive to a completely different conclusion. And that's the trick with art, because this is clearly art, everyone views it differently. The setting is a futuristic (I think) world that at times seems abandoned and at times since inhabited by strange machines that... That I have no idea what they're doing. The only 2 human characters we ever meet is a small girl carrying what looks like an egg and a young man that frankly looks like Archer from Fate Stay Night. As far as I can remember the biggest dialogue ever exchanged was "Anata, dare?" (Who are you?). Yeah, imagine a movie with only 2 people who are both the typical silent game protagonist. Is that a bad thing? Not really, since there is no society to compare them to, it just adds to the mystery.
The movie can be summed up by Surrealism + Silence + Everythingcanbescreenshotedandusedaswallpaper-ism. The art is simply fantastic. There are probably higher meanings behind most of the scenes but honestly, they are just so amazing and grand to look at that you simply get lost admiring them. Honestly not much to say about it, it can't exactly be described... Just watch it by yourself late at night and take your time to draw out your conclusions.
