Great game, I play it pretty often, and I enjoy it every time!
I did have an Idea for the game, idk if it doesn't work with the story or would be to complex to implement but might as well say it.
What if when you got a friend to make friendship you can unlock them as a playable character, and each one would have different stats (1 upside and 1 downside) like Matilda would need to eat more frequently and Sarah would have a faster movement speed; with each one also having a higher likely hood for a specific inflation type like Julie, getting Ass more often or Matilda getting spherical more often.
Just an idea that popped into my head.