Thomas Mahler has unveiled a new build of his game, Luma, developed during a recent GameJam. Luma is a culmination of prototypes he has been working on for the past decade and combines elements of Minecraft and SimCity. Mahler shared screenshots of a vibrant city he built in Luma and highlighted the game's dynamic experience with both daytime and nighttime settings. He expressed excitement about the game's aesthetics and the potential for players to build a space station and colonize the Moon or Mars. A demonstration of Luma's gameplay is available through a provided link.