Kind of my explanation of game[]
We starting game as regular human. Then fishgirl kills us and plugs to mind control, so player can keep playing as a dead boy. He cant drown anymore. This is why secret ending available only after underwater death scene and game completion.
It seems to be mind control attachment procedure only works underwater. And can take sometime. This is why albinos hanging underwater. Mind control for them is not finished yet.
Also orbs everywhere is to provide wireless connection to mind control.
Yes, i am genius :)