It's basically Animal Crossing meets Harvest Moon ... kinda.
You are stranded on a planet, after getting separated from your family ... you need to find them, but you have no money, or means to travel to other worlds.
So, you get a job ... do favours for people ... hunt, collect, trade, etc ... to make money, to get travel licences.
It's like Animal Crossing, but with combat, and more things to do.
Very social ... lots of interacting to be done, and which can make different things happen.
Oh yeah, and you only control your character using the Nunchuk ... that's right, you plug the Nunchuk into the Wiimote, and then set the Wiimote down ... this entire game is controlled using a stick and two buttons, as well as flicking the Nunchuk for certain tasks, such as throwing.