Excellent, completely addictive, contagious (we made competitions between colleagues!), With ability to synchronize its progress between different devices (smartphone / tablet) by identifying with a Google account. Besides this game is in constant development, which further ensures long hours of play! For malcontents, the 0.89 correspond to without advertisement and accelerated time function version that quickly proves to be necessary depending on the type of infection, so even if we start with the free version, you quickly pass on this version, do if only to support the team of developers out there we a high quality game for more than a pitiful rate. Rather, even if there are numerous purchasable options, we are very far from the forced sale!