Hi there!
Have you already played Virus War Game? I have, and wanted to share my opiniom with you. I find it thrilling and very challenging. It has an original gameplot and music. In there I played as a virus and fighted with an enemy. It's actually a real-time strategy, in which you need to use your brains and act fast. I have even found out that soon instead of the laboratory music it will contain some music tracks of The Maneken, whom I consider to be a good singer. Also I'm waiting for Wi-Fi multiplayer so that to play it with a real opponent.
You should give it a try! You should give it a try! It's available on app store. They have actually two versions: a paid one and a free one. I'll give you a link to the free one:
Link to the free version
