Based on the files listed, it appears that is the playable Demo Game Hub which contains an example game. Are you wanting to use the Demo Game Hub project files as a base for your game? If so, you'll want to download the "Demo Game Hub (Project Source Files)". Or if you're wanting to download the demo version of RPG in a Box, you can do that from the main page here: https://zeromatrix.itch.io/rpginabox. Hopefully that helps!
