In this game, you play a mourning mother wandering the spirit realm in search of her child. She has to bring him back, but he moves in vertical directions opposite to her own. I guess that makes it a bit like the old NES game Binary Land, except that the two characters have differing powers - the mother alone can hit switches, and the child alone can pass through walls.

Sad Ghost is the saddest ghost! Wander the afterlife in search of meaning. Can you find it all?

(Sad Ghost is a character invented by my son)