These extra results are called SERP Sitelinks. They are awarded by the search engine to help users navigate your site based on the search phrase entered. It can be different or not show up for each search phrase people find you under.
So if I search with google for:
UX/UI Design game brighton uk
I can find your listing put without SERP(site engine result page) sitelinks:
The sitelinks are driven both by content and structure on your site.
You can also checkout what google says about site links in mebmaster tools: