Jeppe Carlsen developed what puzzle-platform video game released in July 2010 on Xbox Live Arcade?
140 (video game): 140 is a platform game independently developed by Jeppe Carlsen, known for his gameplay direction for Playdead's "Limbo". Limbo (video game): Limbo is a puzzle-platform video game developed by independent studio Playdead. Limbo (video game):  The game was released in July 2010 on Xbox Live Arcade, and has since been ported to several other systems, including the PlayStation 3 and Microsoft Windows.
Limbo