Just played this and it's very impressive, not even considering it was done by 1 person in 2 weeks only. I read your dev log, and of course your ability to create very detailed environments and graphics in very good quality is apparent from the game.
As others have said, the voice acting (together with the excellent graphics) create a really good atmosphere. The linear but interesting story had me wanting to know what happens next.
Another quality is that the game is (relatively) small, but very 'round'. Graphics, audio, story, environment (like the postcards, keys and the map) and puzzles together are a unit that supplement each other.
Again, color me very impressed and not only at your superior graphics abilities but also at the level of wrinting and programming.