I like the idea of expanding the island. Maybe make this some kind of SimWorld? Now that we have our little people functioning at a pre-industrial level, let's up the ante and let them create a higher level of civilization. They could then set up trade routes and cash flow by selling their fishies and flowers to special nurseries and aquariums. Gee, doesn't this sound familiar?

Let's call it VillageSim Tycoon!