Really clever use of the theme. Took me a second to get the hang of it, but was able to complete all the levels. Really like that you provided "red herring" pieces as well. One suggestion if you were to take this game further would be that putting a cold on a blue square makes it even smaller, or even disappear. That way you could mix up not only shrinking them, but making them disappear (and vice versa with multiple hots making things extra big). Great job!