David, a reader of this site, suggested I add Kleaveland to the list of Minecraft games in my Games Like Minecraft section. Any time I get these suggestions, I always check the game out beforehand to see what it's like and if it fits. This time, I was surprised both at how far along development is in Kleaveland and the relative lack of buzz/search results on the project.
I'm hoping that, over time, my Kleaveland page can become a good resource for people looking for information on the game.
The developer behind Kleaveland, Ben's Games, has just announced that they're accepting applications for closed beta testers. I've thrown my hat into the ring and am looking forward to testing it out.
Until I get a chance to actually play the game and give it an honest try, I can't speak to how fun or replayable it is. While you wait, have a look at some of the really neat lighting effects the game has: