@merchantHelios @Dicer I'm only about halfway, but off the top of my head most directly are things like the sense of duty or obligation to do work one doesn't believe in, but that others insist is necessary. The chemical side of the feeling of productivity from working, the gamification of work. The biology of feeling connected. The upkeep of connections between humans like with physical bridges, and the heavenly inverted bridges (rainbows) which connect the dead.

A little deeper is dealing with death, including handling stillbirth as a man. Coping with loss and grief, but also the commodification of human bodies, and others de-personifying the fetus you're taking care of as not a real person. There are a lot of little wordplay connections (look up "rainbow baby"), and hand imagery everywhere with the invisible dead explicitly connecting to the world of the living by making handprints; for some like stillborn children, handprints are the only impression they leave behind.

I can't give a full picture yet, but it's been a great experience with very creative gameplay elements I've never seen before.