Pay pay pay. So I got tricked into dwnloading the game by reading developer's replies to the reviews here. Reviews complained about energy cost of travel but developer replied that you can ALWAYS have energy through watchng ads. Right? No, it's a lie. After watching couple of them you use silver coins, which are super rare and you run out of them after just 1 energy refil (I didn't go that far) And you are redirected to spend real money. All the enjoyment is washed down the toilet.