I think you didnt upload all of your assets
GET https://html-classic.itch.zone/html/11357927/index.js net::ERR_ABORTED 403 (Forbidden)Understand this error
index.html:140 Uncaught ReferenceError: Engine is not defined
at index.html:140:16
also you linked to "localhost" that is the local machine not a server where the game is stored