Welcome to the first of 4 parts of 'The Curse of Anan-Thotep'; why a prestigious archaeologist of the British Museum has lost his mind? Solve the mystery! At the first level, you see two images and have to find 11 differences (that will give you 11 clues); if you're stuck, the pipe will give you a clue; and you have a magnifier that allows you to see closer. You have only 5 minutes, and all the clues you obtain will be later used by Sherlock Holmes and Watson. The game ends at the end of level 1, but you can find at this website the following episode.
You always interact with mouse clicks; for example, at level 1, click on the 11 differences you're looking for (and click on the pipe if you need a clue).