Hello, CliqueIT! I reuploaded the game. Do you think you could try the download again and let me know if it works for you? Otherwise, I would recommend trying the GameJolt link. If neither works, just tell me and I'll see if I can't find another solution.
Okay, I finally got to the root of the problem thanks to yawarahayashi. It's basically the OS Sierra that's causing the issue. This is how to make it run:
1) Right click on the game itself and click "Show Contents."
2) From there, go to the OS Sierra folder and click on the exec file of the game.
3) You may have to go to Security in the System Preferences to be able to open it. The Exec file will go through the Terminal process. It will take some time before the game officially opens.
Please do let me know if this works for you!