In IGDSHARE 111127, we shared a combined digest of "Truth in Game Design" by Jonathan Blow and "Designing to Reveal the Nature of Universe" by Jonathan Blow & Marc ten Bosch. If you have time, it's better to seek out those 2 talks respectively.
http://www.gdcvault.com/play/1014982/Truth-in-Game
http://the-witness.net/news/2011/11/designing-to-reveal-the-nature-of-the-universe/