a couple of ideas that can improve the game
1 system to check if you had a plant (in my first playthrough I never got meat beans) this can be done by making a list of available plants and when you collect, for example, a mushroom, it is removed and now you can collect it again only when the list is empty
2 increase the maximum size to 15 (I saw somewhere how you wrote that additional RT sizes are not a problem for you) as well as the hitbox increase system that is, when it has one by 7+, all by 7+, one by 15, and all by 15, it grows by 1 pixel in all directions (15 by all 2 pixels)
3 maybe a cow girl mode where you can milk yourself and have a max breast size of 17 + maybe you can come up with something (if you think this idea is normal of course)
(sorry for Google translate)