Tap on people to talk to them. Your little sister will talk without being tapped. Use the arrow keys to move. There Isn't really a story or anything so after exploring and talking to people, there isn't much to do. The rest will be explained in the game.
I've always made projects based on books, until my brother told me I should make something that everyone could play, rather than just the people who read the book. So I listened to his advice and made this! (Also, Centerasia isn't real, I just made the name up.