I am not sure how to help there, it works just fine for me in multiple browsers and devices?
Process was the same as all my game jam games.
I checked a few of the extra boxes (mobile support, scroll bars) in the submission page but that's all I can really do.
There should be a loading screen, and then it should load instantly into the game (no menus).
If you hear audio it's working. The only control is clicking and holding the mouse (reccomend fullscreen)