|The latest release is a patch release fixing lost progress after updates. When you have unlocked half the sengins, you dont want to find yourself back at square one after an update.
The previous release, 2.1.21, provided various fixes and improvements. The nuke and tank-firing animations are now more appealing, and the pixelated menus have been cleaned up. We were trying new ads from Amazon, but unfortunately some additional permissions for those dropped Rozz from the Play Market on Nook devices, which filter searches for non-GPS devices. That will be corrected in the next release.