Very good, biggest suggestion I have is maybe when you cross a threshold for increasing in size is maybe having flavor text, just to have the character react to their growth or something of the sort. Example being like your bust reach a certain size on the status menu next to how big the your bust is it say something like "wow these are getting big" or "Im getting really big, i cant even see my feet." Would help make it so size increases dont just feel like an increase in numbers. I do enjoy everything else though, also maybe but the second set of potions to be unlocked at the start of the ruins and not the same time as the third set of potions as it makes it feel like there is no point to use them or buy them.
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Thanks for the feedback! Your first suggestion is one I've gotten quite a few times and have been trying to figure out a nice way of doing it for a while now, your idea of how to implement it is actually really good, that's probably what I'll go with. As for the potions, I suppose it makes sense to have them available earlier yeah, since you even get some tier 2 pots for completing chapter 1 if I'm not mistaken.