It's so peculiar, we have more or less made exactly the same game! It is the strangest thing, because in the beginning of our development period we was actually talking about having the potion shop move through different time periods in order to experience different contexts and customers. It's strange how ideas emerge and are given form interdependently :-D
I love the fact that in your game, the customers can request several different types of potions, it adds an extra layer of management and urgency. It is also a great addition to have the recipe book, and force the player to remove their focus from their task at hand. It leads to some funny moments.
I had a great time playing your game, as it was super inspiring to experience all the alternative ways to take gameplay, that you have decided to do with your version of the same concept.
Thank you for the game, well done! I hope you've had a great jam also :-D