It's very cute and fun so far! I especially like the way the character movement feels distinctly different in each form; the subtle weightiness in the controls between normal Lexy and Starcow Lexy is really fun in particular.
That said, I read your dev blog about it and your concerns about the game's "horniness rating" and I guess I'd say based on the demo it's probably a "T" or "16+" kind of game; nothing is overtly sexual or nsfw, but there's themes that make it suggestive for a general audience.
I would say Cerise's dialogue and appearance (Moreso the clothes the Bandit is in + the handcuffs, rather than the Loony Tunes "nudity") is the most explicitly traditionally suggestive element- it seems clear this is some kind of flirtatious act between her and Lexy even if it isn't quite sexual.
After that, I'd say most of the transformations feel pretty tame; from least to greatest in terms of suggestiveness I'd probably put it as the stone form registering as a 0 on the "Hey, is this...?" scale and the inflation one as the highest, but that might just be bias because I'm aware it's a kink for some- DragonCave has a balloon dragon that's really no worse. I'd say the cow one seems kind of upper-middle, too, though I'm having trouble articulating why. The udders aren't the problem, of course; maybe it's simply that there's a distinct transformation animation from consuming something (milk) that makes the theme even more overt than in the slime form animation.
That's my 2 cents on the way the game comes across, as someone with a (admittedly much lighter) foot in the same kind of doorways. I don't think I'd recommend it to younger teens or children, but I wouldn't think much of it if I saw a highschooler or adult playing this, and I don't think there's anything in it that's really a "Shield your eyes!" moment. But, I do understand that the minor suggestive elements in the game may limit its appeal, so a more adventuresome and less flirty alternative dialogue may be welcome for others.