We found a bug in the game that didn't get fixed until a few hours after the game was released. We fixed and replaced the game quickly, but if you purchased the game within a few hours after it was released, your copy of the game may have that bug. Unfortunately, downloading and installing the updated version won't correct that bug, since the condition is stored in your savegame file. We are working on a way to restore that puzzle in affected games without having to delete everything and start over. We will be notifying affected players when we have a working fix. We sincerely apologize for not catching this sooner.