I understand what you mean, but realistically speaking and without knowing anything about programing i think that you wont get any "freedom" on improving the characters to real beauty levels. I will try to explain why I think this.
Once again, this are merely my thoughts from the perspective of someone with 0 developing experience, a huge 3kg grain of salt to take this.
It seems like the gene system works with a number of predefined items (30 types of eyes, lips, eyebrows, face shapes, head sizes, etc.) but for this kind of game to give the desired results it should have sliders as the base (eyes width, height, depth, position, etc. for each part of the body). It probably would be a HUGE time investment to make around 5-10 sliders from 1 to 100 for each part of the body, some requiring even more, this is the main reason why i think you wont achieve awesome 10/10 results.
My reply was not because i took ofense, maybe i worded it poorly, what i tried to say was that you can achieve nice results taking into account that is a young game created by what looks like a single person.
