Not so hard.<p>You can try to add detect if the user switch to another window.<p>There is a typo in the bottom, there is a missing "s" in "<i>All right_S_ reserved</i>"<p>Chrome mutes the autoplayed sound until you click somewhere. Perhaps you can add a fake "Click here to unmute button".<p>The rainbow progress bar change scale, but I expected that the yellow part disappears. This is an artistic choice anyway.