Preservative Wave

A preservative wave is an event in nearly every level in Mold on Pizza that in which, upon a certain number of buildings being destroyed, will trigger a wave of comparatively large preservatives from the world they occur in. These events usually require a sturdy lineup of mold to defeat without issue, and can likely end your game if you were left floundering beforehand. They're marked in the progress bar as a larger white circle with an angry face, and show how many buildings need to be destroyed before they are released. Bosses are not marked as a preservative wave.