WHY DOESN'T IT WORK
I don't know what the issue is but here are some guesses and possible solutions:
If the download is completing but the files are not appearing on your computer one possibility is that you have an antivirus that found a false positive and is removing it. If that's the case your antivirus will probably have a log of which files it has removed, and might let you manually allow the game. Even if you never installed a specific antivirus you probably still have the default Windows Defender.
Otherwise it might be an issue with your browser, you can try downloading it with a different browser, or you could try downloading it through the itch.io app https://itch.io/app, which also lets you get automatic game updates.
If you still can't get it to work I can issue a refund if you email me at kylernat@gmail.com from the same email as your itch account.