Although the game does not come with a manual, it's pretty straightforward in its controls: point and click. The beginning of the game is just a matter of clicking through the dialogs until you end up in the library. Once there, the game will tell you that you can access the map and inventory with a right-click of the mouse. In the inventory is your phone that acts as the ingame menu. You can change the settings there but also save and load your game.

But all this shouldn't really be that hard to figure out...