private void checkControl()
        {
            KeyboardDevice.update();

            if (KeyboardDevice.isKeyDown(Keys.Escape))
            {
                Exit();
            }

            switch (state)
            {
                case State.BEGIN:
                    if (KeyboardDevice.isKeyTapped(Keys.A))
                    {
                        state = State.PLAYING;
                        startScreen.remove();
                    }
                    break;

                case State.PAUSED:
                    if (KeyboardDevice.isKeyTapped(Keys.A))
                    {
                        state = State.PLAYING;
                        pauseScreen.remove();
                    }
                    if (KeyboardDevice.isKeyTapped(Keys.Q))
                    {
                        state = State.BEGIN;
                        world.remove();
                        world = new GameWorld();
                        pauseScreen.remove();
                    }
                    break;

                case State.PLAYING:
                    if (KeyboardDevice.isKeyTapped(Keys.A))
                    {
                        state = State.PAUSED;
                    }
                    else if (world.gameOver())
                    {
                        state = State.GAMEOVER;
                    }
                    break;

                case State.GAMEOVER:
                    if (KeyboardDevice.isKeyTapped(Keys.A))
                    {
                        state = State.BEGIN;
                        world.remove();
                        world = new GameWorld();
                        gameOverScreen.remove();
                    }
                    break;
            }
        }
        // Initialize the game world
        protected override void InitializeWorld()
        {
            //SetAppWindowPixelDimension(FULLSCREEN, 1920, 1080);
            World.SetWorldCoordinate(new Vector2(0f, 0f), 100);
            preloadTexturedObjects();
            loadControllerObjects();

            state = State.BEGIN;
            world = new GameWorld();
        }