The rewards on this game are ridiculous!! You can purchase gems complete an entire board after using over 7000 on energy and only get 20 in energy in regards!! I've spent alot of money on this game and built up alot of stuff, but recently deleted it! It's not a strategic game like you claim! More like a rip off!! Everything costs!!! 45 gems for 500 in energy that disappears in seconds when cutting out objects!! I absolutely loved this game when I first started but now I have to give it 1 star.