That's a great question; thanks for asking it. KD/WLK created a genre on the PS2, and we're trying to bring that to the PC, where there's currently very little on offer (Cloud, Isostar, and Tasty Planet come to mind). Those levels which look most familiar are the ones where we've "played it safe," but we're also experimenting with different mechanics and visuals (images below). Our goal in creating this product line is to expand the genre, something I don't think the KD series developer has pursued. For a sequel to our initial game, one of the areas I'd like to explore is the players' ability to structure a new society based on what they capture (e.g., players create a new world based on what they take with them, so what does it mean to take along no policemen, or no books, or no meat?). We're also interested in investigating whether things like collaborative building (destroying?) would interest players.
I see a parallel between this and first-person shooters. Doom (and its predecessors) introduced people to a new style of gameplay, and subsequent games expanded and refined that genre. I hope that the Wonderful End of the World series will help expand this one.