Place zombies in the next upgrade, or create a new game with the same thematic maps to look with zombies cm guns or knives would be really cool ... : D I hope you read my comment.
The game is fun, but some little changes could improve gameplay: 1) When an ability is 80+% ready, its icon look the same way as when it is 100% ready. The player doesn't know if the ability is not ready, or it ready, but he missed the flash. When an ability is ready, its color or frame should be changed. (2) When upgrading abilities, pop-up messages should explain what does the upgrade do. (3) Red REC frame is really distracting, it should be made less visible or there should be a way to off at the menu. (4) After clearing main levels, there is no way to spend the gold because everything is already maxed. It would be nice if I could spend it on something like bullets' or the hero's appearance.
 "Portal Defense"){kind=icon}
 "HuntZ"){kind=icon}
 "Project GunGame"){kind=icon}
 "NovaLode"){kind=icon}
 "Battlefield 3 : Mission 1"){kind=icon}
 "Ordem das Tocas"){kind=icon}
 "Paredão"){kind=icon}
 "Death Arena Reality Show"){kind=icon}
 "Harmonia Chat"){kind=icon}
 "Mine Blocks"){kind=icon}
 "Replica"){kind=icon}
 "Effing Meteors"){kind=icon}
Valeu pelo enorme feedback a cada atualização é um jogo melhor para vocês meus lindos.