I'll confess -- I've never been into anything Kojima made....but from the little I know of his past games, this seems like a whole new level of crazy / self indulgent.
I had to watch it like 4 times. I *think* it is some kind of tripped out FEDEX delivery and walking simulator, where rain ages you, ghosts dissolve you and there is a respawn mechanic where you eat worms that grow into infant humans that crawl out your bellybutton... But it could also be a racing sim. I have no idea.