My Home Story game app

Milky_Mocha

Hello
I'm hoping someone on here has played this game before.
How do I earn gems? There is a neighbour system and you can type in another player's ID or their invitation code but I don't always see an input field for invitation code. What's the difference??

Also if I invite someone to be my neighbour does that automatically link them to my Facebook in any way? After someone becomes my neighbour can I take them off?

I cant seem to find an Faq's for this game and its so addictive I don't want to abandon it. My house is worth about 42k at the moment but I've invested time in some design ideas already. I just want to know the implications of the actions and google brings up more questions than answers.

I'll. Save my other questions till I know there are other fans out there.

Thanks!