Galaxy and Stone play online

This game is somehow similar to famous pong or breakout games and you have to keep the stone in the screen as long as you can. 3 sides of the screen are closed and your platform is on the right side. The stone starts moving and after hitting the walls, goes to a direction and you should prevent it from exiting the screen and hit it back at the walls! You will get a score based on how long you were able to hold the ball in the screen. But remember, this game isn’t very easy!