If you don't mind, I'd like to suggest some possible additions, in the form of Modes;
Casual Mode: Everything is easier. Cake doesn't hurt you when it attacks you and you're already full, Coke and Mentos are more potent, enemies do less damage, have less defense, and contain more "FD". Also, the mimic in the boss room is a real sack instead. Intended to better enjoy the fetishy aspects of this fat fetish game.
Competitive mode: Exact opposite of casual mode. It's harder to fill yourself up, enemies have more defense and attack, However, when eating things that increase defense and attack, they do so slightly more than normal. Intended to play into the "game" part of this fat fetish game
Hardcore mode: Exactly like how the game currently is except sacks cannot heal you when you sleep, so you have to use the hearts, and if there are no hearts, then you can't heal.
Also maybe add the ability to continue playing once you eat the boss in the Boss Room
Actually now that I think about it, there's an unfair amount of enemies in the boss room, maybe you should just make the mimic into a real sack, or make it so that defeating a mimic turns them INTO a sack, or something, cause that could fix the balancing issue of the boss room pretty easily
This would all have to be a whole update by itself tho, so like, if you decide to do any of this, take your time and stuff