The game should Pause when you click the pause button. OK, that works, but how do i resume game play without having to reload the house?

Also, i need to know about saving houses, it should save the lot in it's current state.

And when you go back onto the lot, it should be the same as when you last saved. not before you saved.

Can you share your project?

I can't sorry. I'll try to make a prototype one.