Beautiful, but.....

The app could be beautiful but its very easy to lose gems because there isnt a warning when you are choosing some stuff very expensive (I miss 50 gems).
Earning gems (without spending real money) is very difficult and time spending.
In the last days I experienced a very curious fact that upsets me: I bought a building that I also updated (spending stuffs) and the building disappeared. I wrote to Storm8 team and I hope to receive an useful answer.

eggs and milk about Castle Story™, v1.3.2