The quarantine message does not say what you think it says.

It is the same message for all quarantined games and it gives general warnings about certain things, like being suspicous of password protected files, and how people can be lured onto pages by the try my game method.

Also, having no positives on virustotal says nothing. Neither do certain positives. Have seen examples for both. Godot games are actually notorious for having false positives. So are other game engines. They are perfect hiding places to bundle malware with.

Sooo, what does the message actually say? It says that your games has to be reviewed manually, because the system thinks, for whatever reason, that there was activity that might or might not indicate ill intent. If they would be sure, the game would have been suspended or deleted. Right now, people still can download it, but they are warned to be careful.

Further reading here (this also covers quarntine, becaue qurantined games are also delisted while in quarantine) https://itch.io/t/4120453/unofficial-searchindexing-faq