Let me say this first: I like the concept of the game, and it feels like a fun game to play. I like the way the ability system feels, but the game needs some changes to make it more enjoyable. First of all, increase the price of the cards. 1 coin is just really cheap, and I got "maxed" around wave 4 (a bit early, I guess). I got to a point where shooting was really fast, but the auto aim was just slow. If you improve these points, the game will be in a great state!