Wow, you really didn't make it easy on yourself to put together a VN in 9 days! It's kinda refreshing to see one in there, as a VN fan. I wish to say the bad before the good: the font really didn't help me to have a good experience, there isn't a lot of text still as it's a short one, but the shadowy-outline thing put me off sometimes, I do have bad eyesight but I think the reading would have been easier.
The text boxes are really simple, nothing too crazy but they do their jobs. And finally, the idea of mixing ingredients to get to a certain temperature, as it is, doesn't strike as much fun as it could I think at least. Don't get me wrong, I love me some good math, it's just that with the interface as it is not marking which ingredients was taken or giving much info whatsoever, having to remember what you already put in the cauldron, and that at the end it's a simple doesn't strike fun.
Now the good. I really dig the design of the witch, not too simple yet not too much: it's really cute, the colors are really great, and the expression set is large enough to make the story lively. The crow too has its good set of expressions, at first I was afraid that seeing his simple design, he would be up there with some placeholder character, but with his 2-3 expressions and the writing of his character, they both make a good duo making that story enjoyable. The prerendered 3D backgrounds are in the theme, really cute with a great color palette, with enough objects to make it lively yet not overdoing it too much
It's a simple premice, but, in such a short amount of time, the execution really is really good! Great work!