Wormhole

The Wormhole is an item that can be placed anywhere on the game area (whether on the path or not). It costs $10000, and sucks in half of the bloons that come close to it. It does not go away at the end of the round, but slowly sucks the game area into itself (in increments after each round), causing the game area to shrink and everything to move closer together (shortening the bloons' path as well). If you survive this for 40 rounds, the game area becomes small enough that it is totally sucked into the wormhole. When this happens, the wormhole will disappear, and you will travel through time to a random round number from 1 to 200 and be given an amount of money proportional to the difficulty of the round that you have been sent to. Any towers you had will have been destroyed by the wormhole, and you must use the money to purchase new towers.