Step 5 in the Code Club instructions are bit out of date.
Some of the buttons shown for the Google website dont exist any more. See the pink circles in the screen shot below:
The Google site with these fonts has changed since the Code Club exercise was developed.
The new steps are shows in the screen-shots below. The buttons you want are circled in green.
Where it asks you to use a line of <link...> into the <head> section you can use this:
<link href="https://fonts.googleapis.com/css?family=Bangers" rel="stylesheet">
And then you can go back to the main instructions...