Interesting idea to say the least. While I haven't played the game and I can't very well vouch for its game play, the concept is what intrigues me the most. I've always been a fan of exploring the deserts in games, not sure why really. I think what attracted me the most to them would be the feeling of exploration I get out of it. To march across the desolate sands to the soft lilt of the Oud, Kanun, and Durbakki, making pilgrimages at the tombstones of ancient civilizations. To uncover lost treasures and exotic mysteries that, ultimately, were as fleeting as the sands surrounding me, destined to be swallowed up again by some unseen dune when I turned to leave and, for the moment, reclaimed by the sands.
It's those kinds of things that attracted me to the desert levels in the N64 Legend of Zelda games (and arguably the Fire Temple in Ocarina of Time, the most fun dungeon I've ever encountered in the series) and Shadow of the Colossus. Even in Fable II and III, for all the monotony I've had to endure playing through the main storyline, my favorite parts can be summed as such: The Arid Sea Demon Door in Fable II (the one with the old wooden ship split in half in the middle of the desert) and exploring Aurora in Fable III.
I'd also be remiss if I didn't give any credit to the Dune mod for Oblivion.