This is one of those games that are so simple, it takes less than 2 minutes to grasp the concept. However, thats about the same amount of time it takes to get hooked. The game in itself is rather simple: defend a city from pirates by building various towers to stop their advance. However, truly mastering it isnt that easy, and you will find yourself spending quite some time testing different strategies.
All in all, a fun little game, totally worth it.
Eleima about 7 Cities