Pretty nice short game, atmospheric and slow paced. A little interpretation is required as the story isn't thrown at the player; a well made narration, minimalistic in style.
I restarted the game right after finishing it and thought there'd be an alternate ending since most flags seemed to not have been reset, and some characters were missing while others were there but invisible. The lines of text weren't visible either, though I had to click through in order to advance. Edit: closing and opening it again fixed the issue.
One dialogue in particular also made me think of that possibility. Just to make sure, there is only one ending, right?