Bought the full version.
It's odd that once you reach 6x BE on the demo, the full version completely ignores its existence (and multiplier) when you unlock the penultimate size via the bedroom and nude outfit. Was hoping the ??? description with the bedroom would include more benefits to help with reaching 350k than just unlocking the BE nude stand-up sprite and nothing else, not even a bonus to the pre-existing multiplier. Part of me was expecting that unlocking that sprite will resume the player's ability to purchase several more breast expansion multipliers, since that's the reason I bought this game (to see embiggening kitty titties).
As an additional comment; unlocking the bedroom makes it difficult to see the white text for happiness (♥). It blends in together.
I like the music and AI voice; normally I'm not fond of English CV (character voices), but the AI one you picked was pleasant to hear. Hopefully, whatever voice model you use in the future is equally pleasing as they talk to the player.
Checked out your newly created Patreon to see what else you've done or have planned for the future, and all I saw was a poll for 'breast size preference'. As an already paying customer who likes petite catgirls and growth in both bust and height, my preference is the staple 'the bigger the better' (the journey of an ever-embiggening titty-kitty catzilla, who wants to get bustier and bigger, is better than an already big catgirl, who is satisfied with what she possesses).
You follow ink's 'Oppai Oppai Orbs' game, and while they're focused on shrunken woman fetish, I'm also hoping you have a giantess catgirl kink in addition to your breast expansion kink. Maybe one of these days, there'll be an incremental game with the complexity of cookie-clicker, but revolving around a catgirl growing bigger and bigger until she dwarfs buildings, cities, countries, planets, and galaxies (they don't call it the Milky Way for nothing; that's catgirl milk), and universes. All for the player to start over from the very beginning with prestige perks to help along with the journey (and unlock additional content not available the first time around).