Link:
http://www.escapelab.es/escape_lab_alh/
Click on "Entrar"
Then you have to log in:
Then move the screen with the mouse.
Place the central circle over the element you want to activate and click
There are two kind of element:
When you introduce the correct answer a new question will appear.
When you finish all the question on a room a link to a new room will appear.