Cool! Could you try out my game too?
Viewing post in Escape The Lab jam comments
that's because you can't run locally the html5 file. You need a server to do it. If you click the g5 icon on top right of the godot it will run with a local server on your browser.
At the jam page when you submit you have to upload a zip with all the html5 folder content inside. I don't know if you can change the page now but try to reach the organizers