Actually, if you read Arthur's developer diaries, you'll find out more about the game. You can find a link to his last diary in this post. It contains quite a bit of information about Virtual Villagers: The Lost Children, including the statement, "If you have read our previous developer diaries here at Gamezebo, then you know that Virtual Villagers: The Lost Children (sometimes referred to as Virtual Villagers 2), continues with some villagers who find a way through the cave."