Hey ! I've had the same idea just starting this week, you stole MY idea, I'll sue you theft !!!
Just kidding 🙂 I'm not even living in the crazy lawsuits country if you know what I mean.
Did your Game's Template handle both 2D & 3D specific settings ?
It may be good to have a 2D only and 3D only and maybe a mixed type for export size optimization purpose, as engine can be fine-tuned to remove useless stuff.
Also, bunch of game (mostly from Bigfish I guess) have a profile management for players, it could be something to consider adding.