Like any decent web application, this game does not work on Internet Explorer.
Mondial

Discover interesting facts about countries of the world by exploring a world map model that conforms to the metamodel below. As you progress through the levels of the game, more details of the map metamodel will be revealed to you. Use the Model Explorer to query the model with EOL and answer the questions on the right!

Level 1 of 10

Let's get warmed up.

Copy and paste the solution below into the Model Explorer and click on the magnifying glass to reveal the answer.
// We'll give you this one
Country.all.size().println();
@namespace(uri="mondial", prefix="") 
package mondial;

class Mondial {
   val Country[*] countries;
}


class Country {
}