Beautiful game. Wonderful experience 10/10
Though, I have some suggestions
1. Gifting clothes - Although the High Street shops has a store for players' garments, they don't have a role if the player disables weight gain.
2. More variants in shopping - The adding of gifts was a good choice. Yet, I do think having more choices in choosing gifts will be needed.
I'm not saying we need more shops, what I mean is that more expensive or cheaper variants should exist.
Just to make an example, let's take the 'Sporty' type of girl. I our current situation, the only option available (to make most efficiency) would be the Sports Drink. But I suggest more choices. Wristbands for weight lifting, Running shoes, A swimsuit for swimming, etc.
Variants for easier weight gaining could also be an example. Besides the chocolate and cupcake, gifts only tend to effect affection levels. So I suggest more fattening gifts. Easy Bulking powders for Sporty girls, Cookbooks (?) for bookish girls, some 'Body Positive' books could also be helpful.
3. Feeder Feasts in day trip locations - day trips are great in gaining affection with girls, but isn't 'that' effective in fattening them. So having Feeder Feasts in day trip locations could be a solution for players like me who only tend to use day trips for engagement because of it's inefficiency.
4. More hose feeding variants - hose feeding only has two options ; going simple, going crazy. As for me, the term between the two stages felt a bit long, since reaching level 15 isn't that challenging when you're dating like, 7~8 girls at once. In situations like me, players have to go through plain old hose feeding until a girl goes over Hyper. So I think the player should have atleast one, (maybe two?), 'mid' level gainer.
From this part on, it's just about my personal tastes, so completely ignoring it wouldn't be a problem.
5. Lactation - some feederism games (ex : fattening career, happy heifer café, big aspirations) have 'Lactation' related elements, serving as somewhat important parts of the game. I won't argue this be one of the key factors of the game, but lactation events for Macro girls in their few final stages would be my personal cherry on the cake.
6. More 'type' related events - Bratty girls may cuss the player randomly if the player chooses to 'take a look' at the girl. Sporty girls could suggest dates for working out (only allowing locations related to working out - Yet allowing the player into luring the girls to eat), Bookish girls suggest dates for libraries, cafés.
7. Pre-date conversations / choices - before the date begins, players could only ; stand her up, look at her, or go right into the date. Dates don't work like that. Complimenting her clothes, noticing a change in her style (careful insight could effect this), handing a posy of roses, etc
Welp those were my rough suggestions. It be grateful only if you read it till the end. Once again, really enjoyed the game, loved it.