This game looks really fun, but unfortunately I cannot rate it because you did not supply a working Mac version.
4 years ago(+1)
Preferably you add a WebGL/HTML5 version, so people can play in-browser. Again, if you do it really fast, I'll be able to rate it :)
I tried it again, no luck. To run a Mac file, you need more than just .exe files (which macs can't run unless they're running wine) and project folders. Those need to get built into a .app file. In Unity, in the build menu, you select the version you want. Under Mac/Linux/Windows Standalone, you still need to select the type of file you want to build. 
I hope this helps :)