Finished it. Really sweet tale of courage to achieve serenity in a harsh world. Wonderful stuff.
There is some definite trial and error (as I'd expect from a cinematic platformer like Another World/Limbo/Brothers where things can keep changing on you) towards the end but it's warranted as the stakes are so high and you're being tested on everything you've been taught. Some critics might have found that too frustrating, but it's not to the extent of Limbo later levels which felt like filler padding anyway. Everything is cohesive here. I might have had a couple of times where the AI was an issue but it's something you'd see in any super polished AAA game too.
It's impressive when you're platforming below while the character above might be helping with creating those platforms for you, and it never got to the point where I needed another player to take over the AI. That could have gone so wrong as it has with big games like RE5 or games that don't allow the AI to be hurt at all (The Last of Us). The switching is instantaneous anyway, so you can manually do everything and it's obvious when you need to.
There is a crazy plot twist mid-way that changes up the gameplay significantly and there's a bigger revelation, but it's mostly about trying to restore peace against the blizzard. It's just a really well realised and unique fairy tale with a cool subversion that the protagonist is a girl rather than a boy as it is in the original tale of Kunuuksaayuka. There's no Mulan-like gender expectations to face, she just is a tough hero that isn't nerfed because of some plot event.
The cultural insight videos are awesome. Now I wish for more interactive old tales from other cultures.