Fun, catchy, and to the point! Fits the theme very well! And also the best reason to eat cake.
Might be nice to have some sort of points in there to let the player know they're making progress (maybe a progress bar of how much of the level is completed?). Also, spawning too many fire sprites on the screen can quickly cause the engine to slow to a crawl.
Also it's absolutely hilarious that the fire hydrants can catch on fire!