The New 3DS and New 3DS XL have a cool Easter Egg hidden away in their web browsing software.

The hidden treat — discovered by Instagram user 345triangle — requires you to tap the opening of the Super Mario Bros. theme tune and then select a page from your bookmarks. The page is then rendered as the classic title Breakout — which Nintendo would clone as the Game Boy release Alleyway.

You can watch it in action below:

The New 3DS and New 3DS XL launched in Japan earlier this year, and hit Australia in November. The North American and European launches are expected next year. You can read what we thought about the machine here, as well as watch out unboxing and hands-on here.