I did not play it, but I watched a thorough no-commentary playthrough of it. It had some really cool ideas. I didn't quite know what it was trying to be--it seemed like it'd be more of a calming experience to play than anything. I know a lot of people joke it's a fancy "walking simulator", but it seemed to me all of the walking gives time to think of what the story is talking about and get into the head of the protagonist.
It's one of those stories where, at the end, I was thinking, "Okay, that was hard to understand. I need to watch an explanation video." Turned out I understood it, the story is just weird.
But it's weird in a good way. I loved the BTs.
The trailer is cool! Albeit, it's a bit long. I tend to prefer trailers to be short as possible because often times, they give away their best visuals. Love the song they picked!