It's a lot of fun but you run out of energy too fast, especially when you move further into the game. The free energy you get doesn't help much and you have to wait quite a while for the energy to build back up, unless you want to purchase items to help build more and to fill it up quicker. In app purchases ruin a game when they are expensive. This is why I gave 3 stars. it's just frustrating when you spend 10.00 for 250 gems & you buy 7k energy, it Literally lasted 10 minutes.