To find Week 1 activities, click on "Getting Started" in the upper left corner of the website. Once you click on "Getting Started" you'll see the Week 1 content appear in the middle channel of your screen (where you are currently reading my reply).
The Darfur is Dying link is in the middle of the "Week 1 Activities" page. An alternate way to get to Darfur is Dying is to search for it on your favorite search engine. Most of the games we will refer everyone to are established games and have websites that will show up on search engines.