I saw those videos, they are very funny.
I make the boobs games too, focused on stretching and milking processes. If you are interested, you can see them in my profile https://63bitgames.itch.io/
milking simulator rofl. i used mass-springs "a lot" in audio, i was probably thinking second order solution for years before considering making a game :)
there was a gary larson/far side panel of a scientist with his face in a pair of boobs on a panel on the wall. i think of that a lot :)
i always wondered why i didn't see more sex video games since the 80s, like zaxxon with dicks and stuff. or like centipede with... no, ok not that. i'm just doing flying birds now but i was thinking volumetric tetrahedral meshes would make awesome boob sims. maybe squishy lavish bb2 or just like two big boobs and some cursor object to squish them around with for 30 seconds stress relief. boobs boobs boobs rofl :)
hey if you want a game idea,
when i was young everybody got surgery for boob jobs. i found out there's a natural way to make boobs firmer and fuller apart from plain clean living. anything to pass this on so women don't have to see a surgeon i figure is good. plus big boobs. fenugreek seed is a source of prolactin and used in indian food and for maple syrup flavor in the u.s.
women can use fenugreek seed oil topically and see results in a month or two similar to breast growth for nursing. it's better with envigorating massage, clean living and stuff.
maybe i'm old and everybody knows this already.