So, I have some comments, almost all of them concerns.
Firstly, I genuinely appreciate that you actually wrote some prose for each transformation. The other three games I've seen in this style have nothing but the images.
However, I have to mention the obvious - the AI use. (Actual criticism coming after this.) If you can put in the time to learn how to use Twine for a game like this, you can certainly put in the time to find artists willing to draw, learn to draw yourself, or even just use a 3D character creator/pose program. AI stuff is a genuine turn-off for me, as it's the littlest effort put in - putting in actual effort makes for an actual passion that shines through.
Anyway, that was the cheap shot, so let's move on. Most other "potion mixing" games go a bit beyond just mixing the base attributes. Instead of being just "add a single attribute," the ingredients usually represent a vague theme. For example, angel feathers seem more tied to divinity in general than just being an angel - angel feathers + catnip seems more likely to give me an Egyptian theme, since cats were worshipped and even had their own patron goddess. Rabbit fluff is another one, which seems like it would be tied more to fluffy things in general. (Maybe anthro characters? Though that isn't everyone's style.)
Fourth, I really didn't like the secret ingredients. They're a bit too unintuitive to figure out. Typically, they're a bit clearer to figure out, typically some existing piece of text that changes color when you mouse over it, or looks a bit out of place. I probably wouldn't have found out about one of them without checking the spoiler file.
The writing aspect could make it a genuinely interesting take on this tiny genre, but the issues I mentioned just drag it down too much for me.