The game is one of the best in it's class. It looks good, has a lot of content and is pretty interesting. It could do more to challenge the players thinking and not just the wallet though. My concern is the game's extremely aggressive monetizing strategy. The amount of energy the player gets is quite small and ran out very fast. Some buildings and upgrades help this issue in later game, but it is still a the biggest problem after couple of weeks of playing. It would be easy fix if the house upgrades would add more to the maximum energy, but I believe that it is intentional since the every time the energy runs out a pop up ad comes up to ask for you money. The same kind of ads pop up every once in a while in the middle of the game also and in addition, the game field is littered with small rewards that you can get by watching ads. To get five stars, the game should require more thinking and less money. More idle resources and energy would be great.