Too bad, that doesn't do the trick. And I'm not seeing that "Damaged" message, but "The application soko loco can't be opened.". I'll keep looking/trying :-(
Same here, after I download, extract and run the new app file it says: "The application “soko loco” can’t be opened." I'm running macOS 10.15.4. Let me know if I you need more debug info.