This is an unofficial multi-platform update of Spelunky. It can be compiled for both Windows and Mac OS X without editing the game's source code. Every effort has been made to preserve the gameplay of Spelunky in it's original form. However, some changes have been made to the source code to fix bugs or optimize for ease of use and development. This update was created by idyll with assistance from the Spelunky community. Spelunky is copyright Derek Yu and Mossmouth, LLC.