The v1 update is phenomenal. In the demo, the physics that controlled the characters' movements had a janky sort of charm that gave you the feeling of an AI mimicking a struggling human being. In v1, it really feels like a simulation of a living person, rather than an imitation of one. The most lifelike movements are in the underwater portions, especially when the characters double over or struggle to reach for the surface of the water. My personal favorite is the dry control portions as the character tries to turn on their side or spread their legs for leverage. Whether you are interested in the game for the sadist desire of watching a person asphyxiate or you are a masochist wanting to daydream about being in the girls' position, this game will absolutely deliver.
I have not yet reached the final stage of the game, as I have too much fun watching the subtle changes in the characters' movements and facial expressions as she slowly turns blue and stops twitching.