Spoilers!!! Sorry, typing from a phone doesn't allow me to cover it up.
Just finished the game too. Went back and got the secrets as well. I'm enjoying reading everyone's thoughts and opinions. This game is really something. A rare thought provoking journey. I sat and stared at the end as the credits rolled. Look at the blob. It looked almost lifeless. Gave me the impression that you died at the end so close to the ocean and freedom.
It really made me think. It's not often games do that for me. So much water!!! I NEED to know why!?! Why is everything flooded and why are there so many parts that look like ships!? Were they planning on floating away at some point and it all went wrong? The whole game was a giant question mark in terms of this dystopian environment. I kept asking: What brought them to this!? Was it ever normal like we're accustomed to or is this the only way this world knows of? I love games and other media that make me think like that. Ask how humanity progressed to this point and allow me to form my own conclusions. Let's me write my own prologue book in a way.
A brilliant game. One that I would put up there with Portal. A short experience but better for it. Just amazing. Loved it.