Very creepy!!
I liked this a lot, finally a flash game that actually freaked the hell out of me! Great imagery and sounds! However a couple suggestions:
Create a dialog box below the field of vision. I find most of the vision is block by the dialog. Also the "click anywhere to skip dialog, click and drag the box, etc' blocks a lot too, possible show that only the first time.
Have different mouse graphics for different actions. For example, when clicking around the room im not sure what action will take place before i click on something. For example, have the cursor turn into an eye when its over something that will zoom in to investigate, legs when hovering over something that will move to the next room, a hand when its hovering over something to click on. And a exclamation mark when its an appropriate action, for example the wardrobe to hide in when the 'creature' first is coming in and you need to hide.
I find without a system like this in time sensitive events (such as HIDE!) i simply click everywhere in panic mode.
With all that said, you have created a very very very creepy game! Now its simply a task of tinkering with the interface.