It appears the Facebook link function is broken. When I deleted and re-installed the app as part of testing to see if I could get my Facebook profile pic to be used as my in game avatar, I was not able to link the re-installed game to my existing account. I had to get in contact with Alex on Twitter
https://twitter.com/SirThane/status/802529241124376576 and he helped me regain access to my account.
Yeah, it crashes. More sometimes than others. You get the "No connection to server" messages a lot. But the game is very much still alive, and so are the leaderboards, as you can clearly see by the salt on Terror Trails
https://www.dropbox.com/s/srhwuixh9ychi ... 5.PNG?dl=1