I took time during the recent downage to create my first custom quest, titled "Labyrinth of Wisdom." It uses a slightly modified Classic tileset.
It is more of a test/demo than a full-fledged quest, but I have worked on it to my satisfaction.
You will need the very latest beta (378) to play this, as it fixes some otherwise very annoying bugs (being a developer occasionally has its advantages.)
Except for art and music that I obviously stole, the quest is unpassworded and in the public domain. Cannibalize as you see fit.
NB: Running in full-screen is *NOT* recommended on sluggish machines!