I'm battling to get this launched, getting the same as the screenshot below. :(
Viewing post in Jelly Candy Mayhem jam comments
Hey, It's sad it doesn't display install instruction on submission page but it's on the main page of the project.
In the zip archive you have a .exe named "HTML5LaunchHelper.exe", you launch it it will start a local server.
In your browser you enter the link http://localhost:8000/ and it will open the access of the project folder and from this you click on the index.html to launch the game.