Have your IQ tested before installing.
After opening a book you fall down into a strange world and you end up on a dock on an island, from here you're on your own. There's no one to talk to, nor is there someone who can give you instructions or directions. You'll need to find out all by yourself where you are, why you are there and what has happened there. Operate different machinery, travel to other worlds, solve puzzles and the main objective, as it seems, collect coloured pages.
By pointing and clicking at the screen on, for instance, the road in front of you, you'll find yourself the next screen halfway that road and now able to see a building at your right, which you can enter by clicking on it's front-door.
So understand that there is no free roaming as you are probably used to nowadays. The only movement you'll see are the sequences when flipping switches, turning wheels, etc.
The puzzles are mind boggling, they can be pretty hard from time to times. Advice: Keep a notebook next to your keyboard.
Take your time for this one, be patience and don't give up!