Some day, this page might have more to tell you about the peer-to-peer networks that underlie Bitcoin and many other blockchain-based systems.
Right now, we can only offer you a bigger network to play with. As everywhere on this website, what is simulated here is an approximation of what Bitcoin is doing. The main principles are the same, the details vary.
Try creating some forks! Clicking on a node causes it to mine a block. Clicking on a link between two nodes will cause that link to disappear. In the real world, peers can disconnect for various reasons, including Internet-level problems and even deliberate attacks. Can you cause a permanent network split?