Is There a Secret Door to the Tunnel?

There's a section of the tunnel studded with 12 rows of knife blades facing inwards from all directions, and then there is grease. I didn't like that because I feel like it's totally random. And so therefore it's not this, the pleasure comes from seeing them solve it or die. So I think some of it is either above my head or not meant for us to know. That's fine. I like inexplicable stuff. I like empty rooms. I just feel like this had a little bit too much of that."