Before others suffer this fate: back up your game data with Helium http://ggnbb.glu.com/showthread.php?44866-Game-fall-and-restart&p=77654&viewfull=1#post77654
Yep. Great app by ClockworkMod. Will back up all your data to internal or external memory, or to Dropbox (but you need the paid app to restore from Dropbox). Just get the free version and back up everything to an SD card. Highly recommend :)
A good improvement would be Alchemy - transmuting elements with a cost factor and a risk, e.g: - transmute 10 amber to 1 amethyst with a 10% risk of failing or some such mechanics. Maybe Alchemy could be a levelable skill. I also seem to always lack amethyst.....
I got lucky - had just migrated from an S3 to an S4 and had backed up all my data, so I had a fairly recent backup and only lost a week or so. Advice: get Helium from the Play Store and back up frequently until this is fixed (and after lol)