in your terminal
cd [the app folder path]
for example: cd downloads/mac\ build
or right click on the folder containing the app and click new terminal at folder.
xattr -cr [app name]
ex: xattr -cr mac\ build.app
if this doesn't work use the same command but with sudo in front
ex: sudo xattr -cr mac\ build.app
cd mac\ build.app/contents/macOS
or right click -> show package contents -> contents -> right click macOS -> new terminal at folder.
chmod +x *
if that doesn't work put sudo in front.
You should then be able to double click the original app.
The game should be laggy but once you change to a lower resolution it should work fine.