Suveh Nux is a great game. It is a mid-length one-room fantasy game where you have to learn a magical language to escape a vault. You have to learn the grammer, the vocabulary, and some numbers.
One things that makes this game fun that I didn't appreciate when I first played IF is that EVERYTHING is implemented. Anything you think you could do with the spells, you can do. You can destroy everything in the room. There are 5 or more subpuzzles that you can completely miss without the author's note at the end.
I haven't gone back to revisit the game in years, because learning the language is much of the attraction, and it wouldn't be as hard this time. But I definitely recommend the game to everyone.