I absolutely adored this game. While the high score aspect isn't a great source of replayability for me, it's perfect for a game jam, and I could easily see this game evolving into some greater progression or story.
What really sold this game for me were the consistency of the art style and the polish. The movement felt fluid and easy, making me feel awesome jumping into the cauldron from across the screen dodging projectiles as I went. The tutorial was also a nice touch, though the controls are so intuitive that it wasn't even fully necessary for me.
While I like @scarf goose's recommendation of having a shorter timer that resets/increases every time you finish a recipe, I enjoyed knowing that I was only committing three minutes of my life when I wanted to play another round versus who knows how long.
Also, the mushrooms are annoying, but in a good way.