I don't think the Mac version works, there is no file to execute to start the game.
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When I downloaded the Mac version, the folder that was downloaded onto my computer is called LastOneStanding-7.2-pc. I suspect this might be the Windows version accidentally marked as the Mac download. I just downloaded the Windows version to check, and the Windows version has identical folder contents: game folder, LastOneStanding-32.exe, LastOneStanding.exe, LastOneStanding.py, LastOneStanding.sh, lib folder, renpy folder.
If it was the Mac version I think there should be a file with an icon called LastOneStanding.app.
Thank you for taking the time to respond! We believe we have located and remedied the issue now. You were correct about the mix-up. Something must have gone wrong in the uploading process that caused the PC version to come up in place of both Windows and Mac! We have since reuploaded both versions. It should work fine now!
Again, thank you for informing us of this!