The fireworks mode is only 1/2 to 4 seconds range which limits creativity. Many fireworks in S'pore are best shot with bulb mode or 8 seconds exposure (which is necessary to capture many blooms with fine long trails within the same frame and also expose the foreground or background buildings sufficiently at between F/8-F/11 aperture.).
Unfortunately, the S6500fd only has shutter speed up to 30 seconds and does not have bulb mode.
For those who are familiar with taking fireworks, it's better to use manual mode for better control.