Follow the steps to add a new file to your Classes folder. This is a C++ file called GameLayer.

Select your GameLayer.h. Just below the first define preprocessor command, add:

#define GOAL_WIDTH 400

We define the width of the goals in pixels.

Next, add the declarations for our sprites and our score text labels:

#include "cocos2d.h"
#include "GameSprite.h"

using namespace cocos2d;

class GameLayer : public Layer
{
    GameSprite* _player1;
    GameSprite* _player2;
    GameSprite* _ball;
    
    Vector<GameSprite*> _players;
    Label* _player1ScoreLabel;
    Label* _player2ScoreLabel;

We have the GameSprite objects for two players (the weird looking things called mallets), and the ball (called a puck). We'll store the two players in a Cocos2d-x Vector. We also have two text labels to display the score for each player.

Declare a variable to store the screen size. We'll use this a lot for positioning...