Demolition

 is the 25th level in Bloons.

Completion
To win, pop the layers of Spikey Bloons and they will fall, destroying everything below them.

Trivia

 * Aside from the Spiky Bloons placed at the top of the level, there is a bunch of Tile Blocks resembling a city and two layers of regular bloons underneath it.
 * There is also a bomb suspiciously placed inside the innermost and largest 'building'.