Remove play button when viewing html file on Mobile

I have an elearning course that when viewed on a mobile device shows a play button at the start. I need someone to help me edit the HTML so it will stop showing the play button.

Below are some solutions to the problem I have found on line but my files as slightly different so the suggestions are not working.
• https://community.articulate.com/discussions/articulate-storyline/remove-play-button-on-html5-opening-screen-in-storyline-360?page=2
• https://community.articulate.com/discussions/articulate-storyline/remove-play-button-on-html5-opening-screen-in-storyline-360
I will share a demo course with you. Once a solution is found I will need you to provide me with instructions on how to make the change so I can apply them to the actual course.

I have attached the two files mention in the links above so you can see.