This is really fun, though I wasn't sure how to win (or lose!) After I played for awhile it seemed to slow down some. If you're instantiating the kettles you may try activating / deactivating them instead to improve performance. I really liked that you could stop a kettle from heating up and let it cool down a bit--this added to the strategic element because you could try to maintain ballpark temperatures so you didn't have to wait as long. Really well thought out on that. And the music/characters/art were all very friendly and nice!