So, I've played a lot of games from the jam already - and for some reason, yours gave me.. this:
And yeah I know sometimes there are incorrect security flags due to exe files, obviously - but preventing the zip from downloading? That didn't happen to me with any other game.
If this is innocent, perhaps your computer is infected - might be worth looking into...
I will sadly have to skip this one for now - can't take the risk - but please let me know if you figure it out!