This is a very fun and interesting casual game. Click on any animal head in the display area to exchange with the animal head on the steps. If there are animal heads of the same type in the above, below, left, and right positions of the animal head, continue to search for animal heads of the same type in the above, below, left, and right ranges. If there are more than three animal heads of the same type, they will be cleared. Clearing animal heads will get corresponding scores. At the same time, there will be an interval countdown on the left. Each time the interval time is reached, the display will move down one grid and a new row of animal heads will be generated on the top. If the grids in the display area are filled, the game fails. Come and challenge your limits to get higher scores!