KreekCraft, a popular Roblox YouTuber, pointed to Grow a Garden’s popularity on TikTok and Shorts — full of juvenile, goofy clips of the game — as evidence of its younger users.

Roblox games rise and fall with kids’ whims. A paintball simulator might die off after another creator publishes a Roblox clone of Ubisoft Entertainment SA’s Rainbow 6 Siege.

Roblox really wants to move beyond being an app for kids, and that includes making it a place where adults actually meet and date. As he closed out Friday’s Roblox Developers Conference (RDC ...