You have been testing your game in a web browser during development. So what is the difference between your local server and a public or production server?
Just before releasing your game to the public, you will need to bake it. Baking the game is not more than compressing the code. This has two advantages:
Compressed code will load faster into the browser than uncompressed code. A shorter loading time is always a big advantage, especially for people who play your game for the first time. These people don't know yet that your game is extremely awesome and don't want to waste time looking at a loading bar.
The baked code is also harder to read. All your different modules, neatly ordered in separate files, are now in a single file together with the ImpactJS engine. This makes it harder for the average Joe to just copy and paste your precious source code from the browser and use it in his or her own games. However, it doesn't protect against people who really...