That’s probably a good “Flatland” version of it. For a good accessible book on the big bang (and before it) I’d recommend a book called A Universe From Nothing by Dr. L. Krauss. It points out that a universe with no space and no time is fundamentally less stable than one with spacetime. So eventually the universe moved to its more stable state via the big bang. Anyhow it’s an interesting read: https://www.scribd.com/document/539192075/Lawrence-m-Krauss-a-Universe-From-Nothing