file with .app extension that you tried to open

Next time right click on game file and click open

Can you explain why VirusTotal detect this game as malware?

I opened the app on macOS 13.1. Right click on Ribs.app, then "Show Package Contents", Contents -> MacOS. There is Ribs file. Open Terminal app or any command line interface, type "chmod +x" then drag and drop Ribs file to the terminal and press Enter. When you will launch Ribs.app - after first launch right click on Ribs.app and Open.