I like the game but the longer you play the higher the cost to play without purchasing energy and that's just dishonest for the developers to foist on people. At the start it costs 5-10 energy points to dig through a box and just a few levels up it costs from 30-50 energy points. And you don't earn nearly enough to play for longer than 2 minutes. It's ridiculous. Lame move, developers. Response: I think waiting hours for enough energy points to break three boxes is lame, even though it's free.