TouchArcade: It was easy to overlook the issues in the original Zombieville USA. When it hit, the App Store was as foreign and exciting as our new iPhones. Plus, there was no real measuring stick; we just knew it was a fun and cutesy side-scrolling shooter starring the world's favorite bullet-sponges, the undead. Zombieville USA 2 [$.99], on the other hand, has released in a period where we have expectations. Awesomely, Mika Mobile knocks them out of the park by both refining and creating within the confines of the original game.