Heres the focus specs for your camera. Your macro mode is down to 3.9". If you try to get any closer you'll lose clarity. The optical zoom is what you're really interested in. Some of the best macros are taken from a distance using 100% optical zoom.
your pics look pretty good, have you experimented with the white balance?
focus distance Wide: 50cm (19.7 in.) to infinity
Tele: 75cm (29.5 in.) to infinity
Macro wide: 10 - 60cm (3.9 - 23.6 in.); tele - 25-85cm (9.8 - 33.5 in.)