For the pc version, you shouls be able to have a more "settlers" feel to it, i don't mind downloading a big file or even ordering it on cd if I had to You can even have a separate tribe on the island that you discover and can even battle to claim teritorry, you can make weapons out of wood/stone like bows and arrows and have you peeps become warriors.

Bigger maps are a good idea and discovering more after you have completed the original puzzles. A map editor would be good or even random maps when starting a game would be good too...