Click on the building you want to add. (Buy a shop first). You cant load unless you saved first. When it asks "Continue" say yes. The password system is two passwords and you need to be signed in with the same profile when you load and save. The password should not be as simple because it can easily be taken if not complex enough.
Thanks to umbear, YUGALGAUTAM1, and jimmyjamjoop for help with the creation of this project. Please add suggestions and what you thought in the comments v1.8 Added a secret! (Not really but still) v1.7 Added manual labor button, save/load, and improved models. v1.6 Added mute button, remodels to certain buildings, more people, extra scrolling, and alien base.