My Lands: Black Gem Hunting

Well, had a go at this game and it seems ok, but as i aint tried reading any of the info on it i'm not getting very far (my fault i know) anyone got any help as i am not paying for this game so can i actually get anywhere on it? or is it one of those games that get you to pay all the time for the privelage of playing? :/

You can play for free, but paying gives some advantages, such as auto-exploring