Just finished it as well and really just trying to wrap my head around what the overall message of it is.
Think it has something to do with either A) a general Big Brother type vibe B) animal cruelty C) society's obsession with social media D) terminal illness.
I am leaning towards the last one terminal illness. It is just the overall feeling I leave the game with. It was a very weighty, oppressive atmosphere, with basically one situation worse than the last, to finally "escape" and die by the edge of the ocean. I believe each "stage" may be metaphors for what one goes through once they are diagnosed with a terminal disease and also the feelings that come with knowing you are in fact dying.
I mean we all know we are eventually going to die, but if and when you know how and approximately when you are going to die, that is some heavy shit.
But the beginning when you are just trying to "escape," that is when you first find out the news and want to avoid/forget it at all costs. You come across being able to control other people pretty shortly after, and I believe that is a metaphor for losing control yourself and your fate is basically in the hands of other people (doctors, etc.). Then there are the water scenes, and drowning is usually a metaphor of feeling as if you have no control. Plus there is that evil mermaid you have to avoid, which is death itself. Also observation and being observed is a big theme throughout, and again, that can be doctors, operations, etc.
The only thing is though, I am not sure how the blob at the end plays into it. Perhaps it is all of the other people going through the same experience to become one solid entity. All of whom just are looking for a peace?
Or it is about something completely different and I am totally off. That is a lot more likely I imagine.
That is why this is a brilliant game though make no mistake about it. It is open to interpretation, and different people will come away with different takes on what it all means. I am sure we will find out eventually what it all means, or maybe not. I almost hope we do not.
Brilliant game though. No doubt.