It seems to be a problem with building the game on a Windows for a Mac! On the mac's end we need to set the app as excecutable:
First reach at same folder at which your mac build exist. Then within terminal program execute this link of code:
chmod a+x octofurry.app/Contents/MacOS/*
I'm sorry, I had no idea about this, or I'd have stated it here, nobody has ever complained! I'll ask for a friend with a mac to set the file as excecutable so this step won't be necessary anymore.
