Like YouTube, Roblox started as an online stage for young creators. As the company grows toward 100 million active daily users, contributors are making big money selling games.

Games have defined rules and restrictions; that’s not often the case with Roblox titles. For simplicity, however, both "games" and "experiences" are referenced throughout this tutorial.

The creator of Blue Lock: Rivals thought kids on Roblox might like a soccer video game with an anime vibe. It sold a few months later for more than $3 million. The 19-year-old, who asked that his ...