The audio element is part of HTML5, and not specific to Twine.
Your existing audio element is incorrect, which is why the autoplay and loop properties are not working. Try either of the following, they are two ways to write the same thing:
<audio src="audio/Rise of the Empire.mp3" autoplay loop>
<audio src="audio/Rise of the Empire.mp3" autoplay="1" loop="1">
Comments
Your existing audio element is incorrect, which is why the autoplay and loop properties are not working. Try either of the following, they are two ways to write the same thing: