Frustrating

This deceptively simple game is quite fun and addictive. However, it is virtually impossible to upgrade your weapons to high levels (especially level 9) even after in-app purchasing of gems. The app has a feature that actually degrades the level of your weapon if you fail to upgrade successfully. Earlier version of the app was way better in this regard, which didnt include the current method of weapons upgrading. The current feature is VERY frustrating. Wouldnt recommend this app for this reason alone.

Pemus about Zombie Sweeper, v1.5.1