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Layer upon Layer is the sixth level on Bloons 2. Layer upon Layer is the sixth level in Popping Fields. It is the first level to contain the layered bloons. There are 65 Bloons in the level, but if the property of the Layered Bloons is taken into place, there are actually 195 Bloons that can be popped in the level.
- The bloons are in the shape of a cake, which could be one reason for the name of this level (some cakes have layers, such as this cake made out of Bloons).