Thread:Neo34/@comment-32738051-20160423162418/@comment-28625332-20160424090323

Yes, I suspected some ancient backup file was to blame, and because the problem survived several game updates, I eventually decided to take more drastic action and wiped my unrooted Nexus 7 (the level 77 reset was on the Android platform (Neo), not Windows (TheGenie)). Having now gained root access on a different Android version, my strategy changed from using the Helium app (remote backup to Windows) to just a local backup of the player.prf file, and so far I haven't seen a recurrence of the level 77  reset issue. By the way, you can delete the player_backup.prf & player_backup2.prf files with impunity; the game starts ok with just the player.prf file and the other two are just recreated automatically by the app itself. So hopefully that's one problem solved :-)