All you need to do is go into the package contents of the app.
Go into contents, then into MacOS and you'll find a file called "Hammer Dongers", this will be a text file, but it's supposed to be an executable file.
Now open up terminal and type: chmod +x
Then drag the hammer dongers file that you found into the terminal window, to the right of the text chmod +x
It should look like this
press enter and enjoy :)