It appears like some frogs need your help. They are trying to reach the small piece of rock that is surrounded by the water. They can't seem to get the power behind their jumps just right. Why don't you help them out? To help the frogs jump a bit better click on the frog you want to help. Hold down your left mouse button until you see a bar appear near the frog. The higher up it goes the more power is behind the jump. Be careful though, the higher the bar is the stronger the frog will jump and they could end up hurting themselves. The same goes for if they jump with too little power.