"Huge Rock Scroll" is a game that tests the players arithmetic ability. In the game, there will be 3 boulders rolling towards a flower field. You need to observe the math calculations on the boulders before the boulders are pressed against the small flowers. Use your calculations to choose the right hammer to crush the boulders. If a field of flowers is crushed by a boulder, the game fails. You have to crush a lot of boulder, accumulating the flowers you protect can unlock more boulder.