Sorry for intruding but can I ask you something? There'll always be the possibility to choose the MC's body aspect in the story? Like in the passage When you changed from kid to the next stage there was the possibility to choose you character's height (from very tall to very short). I really liked that aspect of the game, it made it more realistic!
Tall for a 13-year-old is pretty different from what's considered tall for an 18-year-old. It isn't too uncommon for someone to be the tallest kid in their class at that age, but totally stop growing from there and ultimately end up being shorter than most of their peers later in life. If you're talking about going from 18 to 23, the change between those ages will be handled differently.