Step by step instructions:
1. right click the game file and click "open package contents"
2. click "contents" then "macOS", you will see one single file inside this folder, keep this open
3. open terminal then type "chmod a + x ", its important to press space after the x
4. drag the file to the right of "chmod a + x " and then press "enter"
5. If you see the file in "MacOS" folder turn black with the words in green read "exec". your game is now playable.
Enjoy!