shit code (literally) xddd

void Game::UpdateModel()
{
    if( isStarted )
    {
        if( wnd.kbd.KeyIsPressed( VK_RIGHT ) )
        {
            dudeX += 1;
        }
        if( wnd.kbd.KeyIsPressed( VK_LEFT ) )
        {
            dudeX -= 1;
        }
        if( wnd.kbd.KeyIsPressed( VK_DOWN ) )
        {
            dudeY += 1;
        }
        if( wnd.kbd.KeyIsPressed( VK_UP ) )
        {
            dudeY -= 1;
        }

        dudeX = ClampScreenX( dudeX,dudeWidth );
        dudeY = ClampScreenY( dudeY,dudeHeight );

        poo0X += poo0vx;
        poo0Y += poo0vy;
        poo1X += poo1vx;
        poo1Y += poo1vy;
        poo2X += poo2vx;
        poo2Y += poo2vy;

        {
            const int poo0Xold = poo0X;
            const int poo0Yold = poo0Y;

            poo0X = ClampScreenX( poo0X,pooWidth );
            if( poo0X != poo0Xold )
            {
                poo0vx = -poo0vx;
            }
            poo0Y = ClampScreenY( poo0Y,pooHeight );
            if( poo0Y != poo0Yold )
            {
                poo0vy = -poo0vy;
            }
        }
        {
            const int poo1Xold = poo1X;
            const int poo1Yold = poo1Y;

            poo1X = ClampScreenX( poo1X,pooWidth );
            if( poo1X != poo1Xold )
            {
                poo1vx = -poo1vx;
            }
            poo1Y = ClampScreenY( poo1Y,pooHeight );
            if( poo1Y != poo1Yold )
            {
                poo1vy = -poo1vy;
            }
        }
        {
            const int poo2Xold = poo2X;
            const int poo2Yold = poo2Y;

            poo2X = ClampScreenX( poo2X,pooWidth );
            if( poo2X != poo2Xold )
            {
                poo2vx = -poo2vx;
            }
            poo2Y = ClampScreenY( poo2Y,pooHeight );
            if( poo2Y != poo2Yold )
            {
                poo2vy = -poo2vy;
            }
        }

        if( IsColliding( dudeX,dudeY,dudeWidth,dudeHeight,poo0X,poo0Y,pooWidth,pooHeight ) )
        {
            poo0IsEaten = true;
        }
        if( IsColliding( dudeX,dudeY,dudeWidth,dudeHeight,poo1X,poo1Y,pooWidth,pooHeight ) )
        {
            poo1IsEaten = true;
        }
        if( IsColliding( dudeX,dudeY,dudeWidth,dudeHeight,poo2X,poo2Y,pooWidth,pooHeight ) )
        {
            poo2IsEaten = true;
        }
    }
    else
    {
        if( wnd.kbd.KeyIsPressed( VK_RETURN ) )
        {
            isStarted = true;
        }
    }
}