Happy ball step down is a very popular casual game, its simple operation makes it quickly accepted by the public. The game is mainly a small ball on a high tower. Each floor of the tower has one that can jump to the next emptiness. The player can rotate the tower to let the ball drill through the gap. The tower is very tall, so the player is as much as possible. Let the ball jump to the bottom, because then you can pass, each arrangement is different, the difficulty will slowly increase. The game also sets the mode of the ball conversion. Game features: - Smooth sliding operation - Clear and simple game characters - Colorful game scenes - Great design ideas - Beautiful BGM - real physical collision