The game is rather small in size of map. All hints lead to one goal. Most of the time you shoot something with laser 'Q' key or use things on something near with 'E'. Listen to sound changes in area. Draw the map on paper. Some notes are only there to provide a fun. Other notes tell you try this, then figure out the rest by looking for changes. Some changes in a room A affect other room B. That should help to progress. :)