Roblox's Dress to Impress is taking the world by storm, fast. The rapidly growing mode allows players to showcase creativity and fashion sense by dressing up models according to tons of themes.

In most Roblox games, your character is, well, just a block. But in Dress to Impress, users play as a highly customizable model, which appeals to the fashion-obsessed.

Still, the Dress to Impress user demographic skews older than most of Roblox. About 63% of users are over 13 (43% are over 18) compared to 51% in the larger Roblox community—though the latter ...