Really cute game, the music is lovely and the controls are well explained in the beginning screen!
Couple of things that would be on my wishlist for improvements would be for the cauldron to be directly on top of the ingredients and to have the list of current instructions at the very top - I kept trying to put the ingredients straight into the grid. It would also be nice if each arrow had its own little artwork, I think that would add to the feel of the game!
Finally, maybe some way of previewing the timing of each obstacle? e.g. a tic counter on each one before it activates? It felt bad having to always fail the level once to find out how each obstacle works.