Mediocre, a concept already seen dozen of times but sadly not well developed in this clone.
The first thing missing in fact of gameplay mechanics is the possibility to attack simultaneously with more than one cloud which is an important feature used in every other title of the same kind; the gameplay feel slow and laggy and the music gets boring surprisingly fast.
The poor art and some power up are not enough to keep the game going: no real feature or in-game depht that makes me keep on playing till the end.. Another waste of medals..
Try Civilizations Wars, it's the same concept but as it should be done.