I'm currently setting up a Trello board for the milestones of this app. Should be done next week (can't finish this fast because I'm going to visit my parents until the end of this week).
I'll update this thread and the store page with the link when the board is done.
As for different body types, it is something that I'm currently experimenting with. Something like child -> teenager -> adult proportion is already in my mind, but I can't promise anything since, well, it is still experimental (originally planned for releases after 1.0). Might change if the experiments turned out to be satisfying though.
Thanks for your suggestions!