To launch Carmen Sandiego look for Carmen's icon or "Launch button" in Chrome, iOS, as well as Android.
Once Carmen Sandiego has been launched you select Begin the Chase you will need to accept the first assignment (The Crown Jewels have been stolen from London). You will then see the ability to use the magnifying glass to interview witnesses in each city, the airplane when you think you know where the suspect has gone.
Just like in the original, along the way you will learn facts about each city you travel to. Once completed I am sure you and your students will be wishing for more, well, there is good and bad news. There are no more available right now; however, there are two more adventures set to be released at a later date (see pictures below the GIF and YouTube video).
Another bit of good news - if your students are really into Google Earth check out their picks, games, layers, nature, culture, travel, and education by clicking here.
Embedded below is a brief tutorial (on Chrome).