It's really good and there is lot's to keep me coming back like upgrades, different arenas and game modes. I do find it difficult switching control between players with the mouse and the line that is drawn when you tell you player run somewhere could be much cooler than the red mspaint line! Overall a very good game however!
Absolutely colossus of a game. Anyone not happy with micro-transactions, pleases bear in mind that is flash game, made by a small team over many years. Not many devs would put so much into a free internet flash game.