Hello!
This is a really, really nice game and I had much fun playing it. I made some cool tactis for killing the enemy-storm-waves, but sometimes they were just better than I was :D
You´ve created an enjoyable game, even with simple graphics. I think that the sounds are fitting and you communicate to the player from the very beginning. The connection from a card-game with tactics and a more "free moving" game where you have to collect stuff is very cool, too. Good work.