Everything is not displaying on screen even in fullscreen, which literally makes the game impossible. I would look into how you have the screen resolution setup.
Viewing post in Nin Time jam comments
I can not seem to find out why do you hear the music playing? I have also only playtest on windows computers despite that should not change anything... You mite be able to fix it by: Reloading the page, Clicking the blue full screen button which will expand the camera view.
I really don't know why this is happening more details would help me fix the problem.