Reposting a comment I left on the video that introduced me to this game:
Returned to thank you: I discovered BABBDI through this video and it has had a profound influence on me.
It's hard to put the atmosphere of this game into words. It's at once abandoned and inhabited, strange and familiar...
It seems like one of the strangest dreams I've had, except it's been brought into physical reality as a work of art.
It feels like a rough sketch / prototype and yet due to being vague and dreamlike, it's exactly the right level of detail.