Man I've found a bug in which you send an enemy flying and then it never comes down, and scroll all the screen up. The game is awesome and very good looking!
Excellent game there, I enjoyed it a lot, but I agree with mrhannibal about the game difficulty.
You have to make different kinds of cards and maybe combos instead of just 6 more armies, but the game goes in the right direction, pretty good!
I'm sure that with a few fixes it will be even more fun, so please, I want to see the next release!!