5 stars game. Wished I could rate it 6 though. Really impressive game.
What got me was the polishing on the UI, everything is so smooth. I'm totally using it in the future as a UI reference
I wonder, did you implement weighted randomness to force the player to use other mechanics? if you didn't, I think it would be a good addition.
Ex: if both parents have blue eyes and A- blood type, make it more likely to add babies with blue eyes AND A-.
This way the player will have to rely on other mechanics to choose the right baby