What's the name of the game where you just type nouns?

I know there’s a game where all you do is type nouns mentioned in the descriptions, and depending on which nouns you type, the story unfolds differently. For the life of me, I can’t remember what it’s called.

You might be thinking of any number of “keyword-based” games (Walker and Silhouette?), but the one that pops immediately to mind for me is The Space Under the Window.

Thanks, The Space Under the Window is indeed the one I was thinking of.