When you first glide into Horizon Worlds, the virtual reality app from Meta Platforms Inc., you’re greeted with a vivid cityscape and portals into worlds with labels like “adventure” and “comedy.” On a recent visit to the “adventure” world, I zoomed around a town in the Wild West toting a Colt single-action army revolver and occasionally trading shots with three other avatars dashing between a saloon and a bank. The avatars sported sun glasses and multicolored hair, but were sans legs, a limitation Meta doesn’t appear to have solved yet.