In honor of DougMcGruff.

I have no idea why the itch.io standalone client is behaving in the way it is. Until you mentioned it, I didn't know the standalone client existed. When I downloaded the client, logged in, and navigated to the game in question (Lennas Porter), it got stuck in some sort of verifying loop. I would suggest contacting itch.io, since this is not something that I can fix. In the meantime, I have confirmed that the download link to manually download the game from the website does still work, and it can also be played in browser.