Thank you! Multiplayer is definitely implemented, and you can have all kinds of flavor of PvP. Free for all, zone restricted, with different death looting modes (some worlds let you loot all of your opponent's gear, others none).
I've been working on this project since 2013. It's a platform for building and playing text-based games (Multi-User Dungeons), both single-player and multi-player, on the browser. The layout is responsive to accommodate both desktop and mobile displays (including the world editor). Would love some thoughtful feedback!