I have a small suggestion regarding both feedee's and player weight gain dialogue. For player weight gain, I like the idea of each personality having responses for you gaining weight specifically if they haven't seen you in a while, like if you jump say two stages between seeing a girl they notice and say something to you about it.
Likewise, I think it could be interesting to have feedee's gain passively in the background if left alone for a while, and they might comment on getting fatter while you haven't seen them.
Just some thoughts, thanks for the sharing your game, its come along nicely!