I'm sorry you're having trouble launching the Mac version of the game! I actually don't have a Mac to test it on, unfortunately, but I can try to help you troubleshoot it. What happens when you open the Game.app file? Is there an error?
Unfortunately it gives the error and I know that it is a rather common problem for those who have windows and export to Mac. Even for those who have a Mac, exporting for Windows is a business and it seems to necessarily require a PC with that operating system to export the game to working way.
Thanks for the additional information! That's an unfortunate bug, sorry about that. I'll be sure to remove the Mac version next month once the contest's over since it's not working, and I'll see if I can find a friend with a Mac that can help me export that version out in the future!