Pong 0.02

// main.cpp

#include <SFML/Graphics.hpp>
#include <string>
#include <iostream>

int main(void)
{
    // variables
    std::string name = "Pong";
    int screenWidth = 1280;
    int screenHeight = 720;
    int framerate = 60;
    int characterSize = 200;
    float ballDiameter = 20;
    float ballSpeed = 5;
    float paddleWidth = 20;
    float paddleHeight = 100;
    float paddleSpeed = 5;
    int player1score = 0;
    int player2score = 0;

    sf::Font font;
    font.loadFromFile("arial.ttf");

    sf::RectangleShape background;
    background.setSize(sf::Vector2f(10, 30));
    background.setFillColor(sf::Color(63, 63, 63));

    sf::Vector2f ballDirection(ballSpeed, ballSpeed);
    sf::Vector2f paddle1Direction(0, 0);
    sf::Vector2f paddle2Direction(0, 0);

    // window
    sf::VideoMode videoMode(screenWidth, screenHeight);
    sf::RenderWindow window;
    window.create(videoMode, name);
    window.setFramerateLimit(framerate);

    // ball
    sf::CircleShape ball(ballDiameter/2);
    ball.setFillColor(sf::Color::Red);
    ball.setPosition(screenWidth / 2.0f, screenHeight / 2.0f);

    // player1
    sf::RectangleShape player1paddle(sf::Vector2f(paddleWidth, paddleHeight));
    player1paddle.setFillColor(sf::Color::Blue);
    player1paddle.setPosition(paddleWidth, screenHeight / 2 - paddleHeight / 2);

    sf::Text player1text;
    player1text.setFont(font);
    player1text.setCharacterSize(characterSize);
    player1text.setFillColor(sf::Color(63, 63, 63));
    player1text.setPosition(screenWidth / 2.0f - 175.0f, 0.0f);

    // player2
    sf::RectangleShape player2paddle(sf::Vector2f(paddleWidth, paddleHeight));
    player2paddle.setFillColor(sf::Color::Blue);
    player2paddle.setPosition(screenWidth - 2 * paddleWidth, screenHeight / 2 - paddleHeight / 2);

    sf::Text player2text;
    player2text.setFont(font);
    player2text.setCharacterSize(characterSize);
    player2text.setFillColor(sf::Color(63, 63, 63));
    player2text.setPosition(screenWidth / 2.0f + 50.0f, 0.0f);

    // game loop
    while (window.isOpen())
    {

        sf::Event event;

        // event polling
        while (window.pollEvent(event))
        {
            switch (event.type)
            {
            case sf::Event::Closed:
                window.close();
                break;

            case sf::Event::KeyPressed:
                switch (event.key.code)
                {
                case sf::Keyboard::Escape:
                    window.close();
                    break;

                case sf::Keyboard::Space:
                    window.setFramerateLimit(1);
                    break;

                case sf::Keyboard::W:
                    paddle1Direction.y = -paddleSpeed;
                    break;

                case sf::Keyboard::S:
                    paddle1Direction.y = paddleSpeed;
                    break;

                case sf::Keyboard::Up:
                    paddle2Direction.y = -paddleSpeed;
                    break;

                case sf::Keyboard::Down:
                    paddle2Direction.y = paddleSpeed;
                    break;

                default:
                    break;
                }
                break;


            case sf::Event::KeyReleased:
                switch (event.key.code)
                {
                case sf::Keyboard::W:
                case sf::Keyboard::S:
                    paddle1Direction.y = 0;
                    break;

                case sf::Keyboard::Up:
                case sf::Keyboard::Down:
                    paddle2Direction.y = 0;
                    break;

                case sf::Keyboard::Space:
                    window.setFramerateLimit(60);
                    break;

                default:
                    break;
                }
                break;

            default:
                break;
            }
        }

        // update objects
        sf::Vector2f ballPosition = ball.getPosition();
        if (ballPosition.x > screenWidth - ballDiameter * 3 - ballSpeed && ballDirection.x > 0)
        {
            if (ball.getPosition().y > player2paddle.getPosition().y &&
                ball.getPosition().y - ballDiameter < player2paddle.getPosition().y + paddleHeight)
            {
                ballDirection.x = -ballSpeed;
            }
            else
            {
                player2score++;
                ballPosition = sf::Vector2f(screenWidth / 2.0f, screenHeight / 2.0f);
            }
        }
        else if (ballPosition.x < 0 + ballDiameter * 2 + ballSpeed && ballDirection.x < 0)
        {
            if (ball.getPosition().y > player1paddle.getPosition().y &&
                ball.getPosition().y - ballDiameter < player1paddle.getPosition().y + paddleHeight)
            {
                ballDirection.x = ballSpeed;
            }
            else
            {
                player1score++;
                ballPosition = sf::Vector2f(screenWidth / 2.0f, screenHeight / 2.0f);
            }
        }

        if (ballPosition.y > screenHeight - ballDiameter - ballSpeed && ballDirection.y > 0)
        {
            ballDirection.y = -ballSpeed;
        }
        else if (ballPosition.y < 0 + ballSpeed && ballDirection.y < 0)
        {
            ballDirection.y = ballSpeed;
        }

        player1text.setString(std::to_string(player1score));
        player2text.setString(std::to_string(player2score));
        ball.setPosition(ballPosition + ballDirection);
        player1paddle.setPosition(player1paddle.getPosition() + paddle1Direction);
        player2paddle.setPosition(player2paddle.getPosition() + paddle2Direction);

        // clear window
        window.clear();

        // draw obects
        for (float i = 5; i < screenHeight; i += 40)
        {
            background.setPosition(screenWidth / 2.0f - 5.0f, i);
            window.draw(background);
        }

        window.draw(player1text);
        window.draw(player2text);
        window.draw(ball);
        window.draw(player1paddle);
        window.draw(player2paddle);

        // display window
        window.display();
    }

    return 0;
}