Your new site is all yours so it doesn't matter if you break it! Try editing the code–add a button element that moves when the user clicks it.

In index.html, add this code on the line after the comment with ADD BUTTON HERE in it (you can copy and paste the button element HTML):

<button>
    Click me!
</button>

Look at the page to see the button. Click it!

Open script.js to see the script that makes the button move.

Try adding more properties to the CSS dipped style for the button to see how the changes appear on click.