Water - Levels with water will act slightly differently than other levels. You may need to raise or lower the water level to reach your goals. Also, the water will cause the normal objects to float!
Water balloons - You will need to pop these balloons to progress in water levels. Once they are popped, they will cause the water level to rise. You can pop water balloons by making matches, using birds, or using power-ups.
Ducks - These cute rubber ducks are goals on water levels. Please ensure the ducks reach the flags, as shown in the screenshot below, so that you can collect them.
Sponge - Sponges will suck up a small portion of water. This will cause the water level to lower so you can reach specific goals. Sponges can be activated by making matches, using birds, or using power-ups.