Excuse me, you can't play, everything is blocked, it indicates that the version is evil.
Sorry, but I don't know exactly what the problem is with Itchio. This is the third time they've done this, and I've already scanned all the files, and they're clean. I sent an email about it, but they didn't reply until 20 days later. (You can still download the game here, but if you want to wait, I'd say until the 23rd or 24th of this month, which is when I estimate they'll remove the warning)
And on Windows' part, I think it's because of the engine or because I have to pay for a certificate to windows