From the previous "pong type game" to add : the star does not collide with the screen borders but travels through them, reappearing from the opposite side. The racket (object controlled by the player) is 4 pixels in length and is attached to the screen borders, it cannot be moved "inside" the map but it will remain attached to the borders. Increase both the star speed and the speed of the racket. When the star hits the racket, it will be bounced back just like in the original pong game. If the star hits a planet, it will partially destroy it, removing part of the pixels composing it and bouncing back to a new random position