Hey, just a heads up that this doesn't load for me. If I open up the console before clicking play I see these errors:
Uncaught SyntaxError: Invalid or unexpected token (at Pursuing Pixels :1:1) index.html:141 Uncaught ReferenceError: Engine is not defined at index.html:141:16
I haven't seen this before, but https://godotforums.org/d/26990-html5-exporting-not-working-with-newgrounds makes me think that potentially 'index.html' is trying to load assets by the wrong name? Sorry I can't be more help :(