Youve done a great job with some of the images, I have found that doing the pixel art is usually the most time consuming part of writing a J2ME game.
I didn't make all the pixel art.
I recruited many (we started with a team made of 6) artists on
Pixelation.
Many of the "artistic" details are explained step by step on this
topic there.
We needed 1-2 weeks to decide the style and roles of every members of the team and at the end the "main artists" were 3:
Madspin for tiles sets
Ashraw and Simont for sprites and other graphical elements (splash screen).
Also a girl (Elisa) made the
concept art (how will look the castaway? What about indigenous? and things like this).
If someone of you need an artist for some good project or better a paid one I'll be happy to contact them

Many thanks for the moral help that you are giving me.
ciao,
dw