vale of singing metals is probably the best Twiny Jam entrant I've played so far, and an excellent example of how to create a challenging game in Twine: by using links to create a maze. At first you merely want to find your bearings and explore. Later, you find an object and instructions on where to put it.
This is a straightforward concept, but vale of singing metals uses dream-logic and surreal, evocative sensations to guide the player through the maze. Saying much more about it would probably spoil it.
The colour scheme is enjoyable and works well with the dreamlike but calm ambience.
Strongly recommended to those who are interested in seeing the more game-like uses of Twine, or who want a poetic but decently challenging puzzle.