MAKE MORE
It is a very good app, and it would be nice to see things like black ops 2 zombies in another app maybe next year, and then blacks ops 3 zombies in a couple years, and whatever comes next, but with rising performance on iOS devices, I think you can afford to increase the poly count a bit.
Hammer7450 about
Call of Duty: Black Ops Zombies, v1.3.5