The Endling Archive manipulates Inform 7 in a truly interesting way.
The game treats the player as someone using a database written in the traditional Inform menu system (using N, P, Enter, and Q to navigate). As you read more of the database, more and more becomes unlocked.
The game uses interesting pictures. The story is based on the idea of survivors, the last of their kind. The database starts out with different real-life examples of endlings, and then transitions to different material.
I really enjoyed it, although the ending fell a bit flat. It took 10 or 15 minutes to play.