When you write about Minecraft, you’d better get it right, or millions of kids all over the world will be ready to pounce on your errors.

The Financial Times learned this the hard way. Last weekend, the paper published a story on the Microsoft-owned hit game, titled “The business behind Minecraft.” And this weekend, Zorawar Bhangoo, a 6-year-old from London, wrote in to correct the paper for a graphic it published to accompany the piece.

Bhangoo’s handwritten note, which the FT transcribed and reprinted in its letters section, reads:

Sir, Your big Minecraft picture on the front page of your Life & Arts section (July 4) is wrong.

In Minecraft, smoke does not come out of chimneys and doors cannot be a light colour. Doors need four boxes at the top of them. Trees have to be round and not any other shape and you put the trees a rectangle shape. The clouds have to be 3D. You put the clouds upright. The roof of a house cannot be blue.

Zorawar Bhangoo (age 6)

London SE21, UK

This kid’s got a bright future. And the FT may need to build itself a burn unit in Minecraft, because getting owned by a 6-year-old has got to hurt.