The money whoring is far more intense than the game play itself. And the only thing more annoying than the money whoring is how long it will take you to get upgrades. 1/5
Just wanted to revise my original comment. I didn't realize that you could keep playing when you were out of energy. But I think the game would still be better without it. So 4/5 now.
This game would be a 5/5 for me if it weren't for the energy. I understand needing to make money but why not just do it through packs. I don't mind people getting better cards faster by using money to get better packs. As it is 3/5.