The creator made both the moon and sun. The sun is a light and makes our food grow, and the moon is also a light. Without the moon the night time would be pitch black and animals depend on the moonlight to navigate.
There's many other little reasons that our world requires a moon. I don't believe we can actually land on it, it makes no sense from the creators point to make it "landable". It's simply a light with specific functions. The landable moon is part of the globe theory.
I have heard theories that aliens or humans made the moon and was brought here and they use it as a headquarters to spy on us and zap down frequencies to keep us in a "sheep" type trance but that theory and similar ones require space and the universe, it doesn't fit into the flat earth theory so I'm going by the flat earth theory unless I find more evidence.