Can I know why I only get one puzzle not the figure I wanted?

Question

I attached an image which is a row of different colours puzzles and the code runs perfectly fine except for the figures that supposed to be shown ... the figures I initialized in 2d array for example ( 1,3,7,5,) this is the first one though it doesn't appear that way , to draw them I also used for loop

Here is the code

while (window.isOpen())
{
    float time = clock.getElapsedTime().asSeconds();
    clock.restart();
    timer += time;



    Event event;
    while (window.pollEvent(event)) {
        if (event.type == Event::Closed)
            window.close();
        if (event.type == Event::KeyPressed)
            if (event.key.code == Keyboard::Up) rotate = true;
            else if (event.key.code == Keyboard::Left) dx = -1;
            else if (event.key.code == Keyboard::Right) dx = 1;

    }
    if (Keyboard::isKeyPressed(Keyboard::Down)) delay = 0.05;

    // < moving >> 
    for (int i = 0; i < 4; i++) {b[i] = a[i]; a[i].x+= dx;  }
    if (!check())  for (int i = 0; i < 4; i++) a[i] = b[i];
    // rotate 
    if (rotate) {
        point c = a[1];       //center point 
        for (int i = 0; i < 4; i++) {

            int x = a[i].y - c.y;
            int y = a[i].x - c.x;
            a[i].x = c.x - x;
                a[i].y = c.y + y;
        }
        if (!check()) for (int i = 0; i < 4; i++) a[i] = b[i];
    }

    //tick//
    if (timer > delay)
    {
        for (int i = 0; i < 4; i++) { b[i] = a[i];  a[i].y += 1; }
        if (!check())
        {
            for (int i = 0; i < 4; i++) puzzles[b[i].y][b[i].x] = colorNum;
            colorNum = 1+ rand() % 5;
            int n = rand() % 5;
            for (int i = 0; i < 4; i++) {
                a[i].x = puzzles[n][i] % 2;
                a[i].y = puzzles[n][i] / 2;
            }
        
        }
        timer = 0;
    }

    //// check lines 
    int k = M - 1;
    for (int i = M-1; i > 0; i--) {
        int count = 0;
        for (int j = 0; j < N; j++)
        {
            if (puzzles[i][j])  count++;
            puzzles[k][j] = puzzles[i][j];
        }
        if (count < N) k--;
    }


    
    
    

    
    dx = 0; rotate = 0; delay = 0.3;



    window.clear();


    for (int i=0;i<M;i++)
        for (int j = 0; j < N; j++)
        {

            if (puzzles[i][j] == 0) continue;
            sprite.setTextureRect(IntRect(puzzles[i][j]*122, 0, 110, 122));
            sprite.setPosition(j *34 ,i *34 );
            sprite.move(28, 31);
            window.draw(sprite);
        }

    for (int i = 0; i < 4; i++) {
        
        sprite.setTextureRect(IntRect(colorNum*122, 0, 110, 122));
        sprite.setPosition(a[i].x * 34, a[i].y * 34);
        sprite.move(28, 31);
        window.draw(sprite);
    }
    
    window.display();

}

}