I think it's a great game in many ways. The story won't win the Nobel Prize for Literature, but it works and is interesting. The art is good, and it works well for the game. And the mechanics of the card game, although it could be given some tweek so that it wasn't always the same, are fun. I suppose as the game develops further, we'll be able to experiment with other types of decks. So far, I've only seen two possible decks: either go for the highest card, or try to play the green-haired card to triple the damage (for that, you have to try to remove the highest cards from the deck, or it'll never work). The gameplay could really be much better if, in addition to the electric cards, there were other types that combined differently (fire, water, etc.). They could even be combined to create other effects.
But anyway, all that will be revealed as development progresses. So far, it's very promising.