Round-a-bout

Not to be confused with the Bloons Junior level, Roundabout.

Round-a-bout is the 22th level in Bloons.

Completion
In order to win, you must first pop the Boomerang Bloon then throw the boomerang around the Ice Bloons in the middle while trying to avoid hitting it, use your remaining extra dart if necessary.

Trivia

 * It consists of a single Boomerang Bloon on its own as well as a large chunk or regular bloons with two Ice Bloons at the middle of it.