Knockdown is a funny reaction-based casual game. There is one touch control in this style of play. The unique, one click and hold gameplay makes for a simple yet fun experience. Your aim is continue below by breaking the orange doors. You can hold to move the ball to the orange door, and click to let the ball break the door.Try your best to move fast and win the rocket bonus.Be careful to avoid the yellow spikes which will make you lose at once.