I love the concept, and the changing maze was a really nice interpretation of the limitation.
I got stuck on a couple of small things, like only holding two things at once, and getting the ingredients from only one side of the counter in the storeroom. I also really wish you could tell what is currently in the cauldron, and got feedback on when it is flushed and such.
The ghosts and witches theme was really good
The music and sound effects really fit the mood and the rest of the gameplay well.