Can you tell me a little more about the game in general? What, as a potential player, would drive me to play your roguelike instead of another?
Interesting question and hopefully partly answered at the website. I also can't say what YOU would make you play it. I can only tell you what I was missing in other roguelikes that made me create my own. Maybe it's valid for you, too.
* Story. Most roguelikes, except the great Legerdemain, don't have a detailed background, history or even story. Which is understandable, as this can damage replay value, or decrease the abstract feeling of some roguelikes. When I started with LR, I knew no other roguelikes with a rather detailed setting, so I started out. I still add details to the game world's history in each release, while trying to not overwhelm more purist roguelike players with too much text.
* Accessability. In 2009, I started to change the GUI of the game to an MMORPG inspired style. Back then it was the first roguelike that did this and it was received well especially by players new to roguelikes. Nowadays, many other roguelikes are very accessable, too, e.g. ToME 4 or Dungeons of Dredmor.
* Less is more approach. I never had the plan to have zillions of features in the game, because it is very hard to put this in a coherent setting, and to balance it. Thus, I think very long before I decide to add features, even they are perceived as standard in other roguelikes. This also adds to accessability. My goal is to be somewhere in between the big, really complex games, and coffeebreak roguelikes.
So, world background / story, and accessability are for me the main reasons I developed the game. Consequently, not the hardcore roguelike players play LambdaRogue, but players who like the lighter approach and the story things.