Zen Wars ($0.99) by subzero.eu is a castle defense game that requires strategy and timing. You must build your empire, stock it with weapons, and destroy the enemy before they destroy you.
The goal of the game is to destroy the enemy before being destroyed. You must aim your cannons accurately to stop the enemy from crossing into your territory. After each round, you will be able to repair and rebuild your walls. The more completely enclosed wall barriers you have, the more weapons you can add to protect your empire.
There are three modes of gameplay, Campaign, Survival and Multi-player. One unique new feature that Zen Wars includes is the ability to create a multiplayer game with two or three people by logging into Game Center. At the moment, Game Center players are scarce for this game, but in no time at all, you will be able to go head-to-head with your Game Center rivals.
The game utilizes a shake feature that, without help from the developer, I didn't know existed. If you want to pause the game, you must shake your device. A menu will drop down that will allow you to mute the sound and retry a level.
Overall, this game is fun and exciting and pushes the limits of your ability to strategically manage an army of cannons. Multiplayer capability is an added bonus, and the ability to find other players through Game Center makes it a must-have for fans of castle defense games.