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

It's a cold winter night in Villa Emfatica. A group of people is scattered across the rooms of the villa but not all of them are alive. The solution to the mystery hides in a model that conforms to the metamodel below. As you progress through the levels of the game, more details of the metamodel will be revealed to you. Use the Model Explorer to query the mystery model with EOL, answer the questions on the right and find the murderer!

Level 1 of 11

Let's start by getting to know more about the murder setting.

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
Person.all.size().println();
@namespace(uri="murdercase", prefix="")
package murdercase;

class House {
   val Person[*] people;
}

class Person {
}