The current state of sound on the web is a bit of a mess and has been for quite a while. For a long time, there were issues with loading MP3 versus OGG files based on which browser you were using. Recently, there have been issues with browsers blocking sounds that play automatically to prevent annoying audio spam. This feature in Chrome sometimes seems to create problems when playing audio in our game. I have noticed that, if Chrome does not initially play the audio, it will usually play if you reload the page. I have not had this problem on Firefox.
You will need to include several images and audio files in your build to make this project work. Make sure that you include the /Chapter12/sprites/ folder as well as the /Chapter12/audio/ folder from the project's GitHub. If you haven't yet downloaded the GitHub project, you can get it online at https://github.com...