For anyone who is having issues downloading or running the demo;
1.Make sure you are fully unzipping the game, it is a ZIP file which means you have to use something like winrar or 7zip, or even windows built in extracting process.
2. Make sure you let all the files show up before you try running the game, same thing happened to me the first time i extracted the files. Not all of them showed up right away, so I would wait 2-3 mins before running.
3. If the game still doesn't want to open or run, try running the game as a administrator.
Best of luck this is all I really saw people having issues with so I thought I'd try and help <3