Actually bought the legit version on Steam.
I LIKE the game, it's not bad, but it's definitely not finished, and seeing the [Final] on F95 makes me worry the game's done.
Anyway, it's another Vampire Survivors, action-roguelite, horde battler, bullet heaven game.
Each transformation potion increases a certain aspect of the character, like making her boobs bigger or smaller, making her a catgirl, making her hips wide, whatever, but each transformation is tied to a certain skill vibe, like big breasts giving you a ton of huge explosive spells, or the corruption potions giving you DoT stuff.
The gameplay itself is fine, nothing extraordinary, though the game is weirdly really easy and you can pretty easily bumrush through all three difficulties in an hour or two
Lewd content, there isn't any. I don't even think there's nudity. The only lewd content is the fact you're making her bustier or turning her into a succubus I guess. There's a paid DLC gallery, which I assume must have something raunchy in there, but I'm basing that off a guess.
Dunno, overall it's just a solid bullet heaven game, definitely worth the money I paid for it on Steam, I just wish there was more to it.