The maker of Minecraft made a game called Prelude of the Chambered for the Ludum Dare 48 contest.
I thought that it had a cool concept, so I made my own in Flash in 8 hours.
Of course it's not like Notch's by any means. It doesn't have monsters, or bosses, it's just a simple maze game. It does get boring too, I must admit. Well, that's what I get for not taking my time! :D
Here's a video of me making it: *looks like the video was deleted some time in the past :( silly me*