Hey Yehezkhel. Similar situation happened before with another warning that turned out to be false positive: https://itch.io/t/491547/looks-great-but-apparently-the-demo-contains-a-virustrojan
Is it the demo or alpha? Any specific file gives the warning? Please let me know which version of threat definitions do you have. It's late for me, so I'll check tomorrow and send the file to Microsoft for verification.