The game you are going to create is going to work quite a bit like this:
When you have completed today's goal of creating a browser based game you should understand:
This is just a rough guideline, not a mandate. Some steps you'll go over and some you'll go under. It'll all work out by the end of the day. Probably.
Before you can start the tutorial, you'll need to download the tutorial to your computer to edit the source code.
Once you've downloaded the zip archive file, you will need to extract the contents and open index.html with your browser. If you have trouble extracting the files or opening them, get an instructor to help you out.