Hi, thank you really much for your feedback, but I'm not quite sure what's your problem ".app" file types for MacOS should be something like ".exe" type for Windows so there shouldn't be any problem running it, you're sure you have downloaded right version for your os ?
Sorry I did not make it clear but I am using MacOS and downloaded the MacOS version of the game. The issue is with the file "badlands" in the "/Contents/MacOS" folder of the Badlands app. The file should be a executable file for the Mac operating system, but rather than being executable it is just a text file.