Pong-2P/client/Game1.cs

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace client
{
    public class Game1 : Game
    {
        // Game instances
        private Player pl1;
        private Player pl2;
        private Ball ball;
        private KillZone killZone1;
        private KillZone killZone2;

        private UI UI;
        private SpriteFont spriteFont;

        private GraphicsDeviceManager _graphics;
        private SpriteBatch _spriteBatch;

        public Game1()
        {
            _graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
            IsMouseVisible = true;
        }

        protected override void Initialize()
        {
            // Window
            Window.Title = "Pong";

            // UI
            UI = new UI();

            // PLAYERS
            pl1 = new Player(
                new Vector2(15, _graphics.PreferredBackBufferHeight / 2 - 50),
                15,
                100,
                100f
            ).SetControllable(true);

            pl2 = new Player(
                new Vector2(_graphics.PreferredBackBufferWidth - 30, _graphics.PreferredBackBufferHeight / 2 - 50),
                15,
                100,
                100f
            );

            // BALL
            ball = new Ball(
                new Vector2(_graphics.PreferredBackBufferWidth / 2 - 5, _graphics.PreferredBackBufferHeight / 2 - 5),
                10,
                0.2f
            );

            // KILLZONE
            killZone1 = new KillZone(
                new Vector2(0, 0),
                15,
                _graphics.PreferredBackBufferHeight
            );

            killZone2 = new KillZone(
                new Vector2(_graphics.PreferredBackBufferWidth - 15, 0),
                15,
                _graphics.PreferredBackBufferHeight
            );
            killZone2.isLeft = false;


            // TEST
            ball.StartMoving();

            base.Initialize();
        }

        protected override void LoadContent()
        {
            _spriteBatch = new SpriteBatch(GraphicsDevice);
            spriteFont = Content.Load<SpriteFont>("scoreFont");
        }

        protected override void Update(GameTime gameTime)
        {
            pl1.InputsControls(gameTime, _graphics.PreferredBackBufferHeight);

            ball.Move(gameTime, _graphics.PreferredBackBufferHeight, _graphics.PreferredBackBufferWidth, pl1, pl2);

            killZone1.Collisions(ball);
            killZone2.Collisions(ball);

            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.Black);
            _spriteBatch.Begin();

            UI.Draw(_spriteBatch, _graphics.PreferredBackBufferWidth, _graphics.PreferredBackBufferHeight, spriteFont, 0, 0);

            pl1.DrawPlayer(_spriteBatch, GraphicsDevice);
            pl2.DrawPlayer(_spriteBatch, GraphicsDevice);

            ball.Draw(_spriteBatch, GraphicsDevice);

            killZone1.Draw(_spriteBatch, GraphicsDevice);
            killZone2.Draw(_spriteBatch, GraphicsDevice);

            _spriteBatch.End();
            base.Draw(gameTime);
        }
    }
}