Its fun for a couple of minutes, but needing no energy doesnt make up for the fact that without money your deck will suck, or you will need to beat the same opponents hundreds of time for a chance. Dont waste your money on this yet, until the odds are better for basic packs.
In the first couple of levels I thought the game was stupid easy, but after a couple levels more, I found how wrong i was. Played a lot of games in kong and I must say not many are very innovative right now. Not the case here 5/5.