Works on a Mac with one small fix:
After unzipping, right click (or control-click) on the application and select "New Terminal at Folder". A Terminal window should appear. Type the following in that window and press enter:
chmod +x "Contents/MacOS/Our Elusive Suffering"
(You can close the Terminal window afterward.)
The app is still missing a developer signature, so you'll have to jump through the usual hoops to open it (google for instructions if you need them), but it does run and the game appears to work as intended (not that I've figured out much yet).
For the developer: If you don't have access to a Mac, you can do the above chmod command in Linux and re-zip the application to fix it. Windows ZIP utilities might even offer a way to set Unix executable flags on archives.