There's no such thing as "finished"

We'll be learning a lot about iteration throughout this book. Some game developers who produce content for fixed media such as game disks and cartridges are used to producing a gold master—the final build of the game—and calling it a day. One of the joys of deploying games to the Web is that they're never truly finished. You can continue tweaking your web games and modifying them until you end up with a far more fun and polished game than you started with.

Flashbang Studios constantly modified and improved upon Off-Road Velociraptor Safari even years after they were "finished" - three years afterward, in fact! The team addressed critics' initial concerns about sluggish performance by relentlessly tweaking the game and improving upon its performance.

Likewise, we'll be creating some games that are really raw and unfinished at first. But as we learn more about how to program the crucial bits and pieces common to many games, we'll keep revisiting our rough, early games to add those pieces and improve them.