TouchGen writes: "I hate how my time gets all consumed at times. Looking down on my iPhone concentrating, planning and upgrading. Looking up I have often lost one or two hours to the game. This happens too often with tower defense games, and BioArmy is no exception. It is never about the story, but always about finding the perfect strategy. To be a good game in the genre being challenging is a must. Too many times I find that tower defense games come with too simple levels of difficulty. In Bio Army I get my ass kicked, and I love it".