Zombie Survival Fallen City Pro
This is a fun, 2D zombie shooter game with no ads. In this game you will go through six different levels and buy different guns along the way all the while trying to survive waves of oncoming zombies. You can select from three different difficulty levles and play either the campaign mode or level select mode. This game is a lot of fun and will have you wanting to play all the time.
I would also like to add that updates are coming.