I'm using Norton by Symantec, and the antivirus flagged it during runtime, which means it behaved in a suspicious way. My antivirus product is pretty good, but it's probably a false positive as you said. I'll revise my post, but I still don't trust the game as is.
Viewing post in Quantum Tournament (Tech Demo) comments
Completely understandable, and I guess it might change the situation a little if a reputable antivirus like Norton is reporting it... though it says "Undetected" on Symantec through VirusTotal? Might be a different version.
Thanks for bringing this to my attention, and thanks for revising your initial post. I'll update here if I find anything more to this matter :)