I've played development versions of the game. Hopefully I'm not spoiling too much, but there are certainly puzzles. They are super mind-bending and _different_.

I've played development versions of the game. Hopefully I'm not spoiling too much, but there are certainly puzzles. They are super mind-bending and _different_. Definitely gave me the "now you're thinking in portals" feeling. The other thing the puzzles reminded me of were the mechanics of Braid, where solving the puzzles requires a lot of un-learning about the way video games are supposed to work.