Not sure if you are aware but your game has been quarantined by Itch.io. It looked interesting but I will have to wait until the situation is clarified to try your game. The pop-up message I received was, “Our system has flagged this page for additional review due to potential suspicious behavior from the page owner.”
I don’t believe Itch.io likes the .7z format at all, so that may be the cause of the problem if it’s a false positive.