蜜芽传媒

In popular online game Roblox, you can do the same thing for your avatar by heading to in-game shop the "Catalog Avatar Creator experience".

It's been visited more than 1.6 billion times, making it one of the most popular online stores on Roblox.

But it wasn't created by a big global tech company - instead, it was built by 19-year-old Birmingham student Muneeb.