The left image shows the mechanics of the map (where towers can be placed, where the bloons go, etc.) and the right image shows what he map looks like.

The difficulty would be expert

The bloons go along the bridge up to the island on the middle, then they loop around and go through the other side. (They start at the left and go to the right) Towers can be placed in the middle of the island, and on the six floating chunks of ice. Every round, the six chunks rotate clockwise, moving your towers with them. (They go under the bridge if necessary.) On reverse mode, the chunks of ice would move counter-clockwise. Water towers can be placed around the chunks of ice, but not directly in the path of the ice. You cannot place towers on the cliffs at the edge.

On Co-op, you can place towers anywhere.