Pearl Dammeyer OHara said:

I have only just started game  maybe an hour or so , yet I see buildings and upgrades That I did not do.  Are you able to tell if some 1 else has done this  by hacking into my computer ?

Hello, Pearl. Please note, your game account security is the sole responsibility of you as the account holder, and Plarium claims no responsibility or liability from any losses or damages incurred as a result of compromised login information or third-party security lapses. 
I would recommend that you read this article >>> 
https://plariumsupport.zendesk.com/hc/en-us/articles/360001391011-Security-policy

Hope this information will be useful.