Rialgar and I really enjoyed developing HTML5 games during the past LD compos, but we were curious what could be achieved with more time than just one weekend. So we gave us some months and developed an HTML5 MMO demo.
The terrain is generated procedurally by a Java server and transmitted via a WebSocket. The whole scenery is rendered by the awesome three.js library I also used for my last LD entry. The server takes care of client synchronization so you can see other players moving around. We also implemented a rudimentary combat system.
To make the world a little bit more interesting, we added an editor so that players can create own structures like houses or trees and add them to the world.
It’s not a complete MMO though as it is missing features like a level system, quests or dungeons, but we think it shows what HTML5 is capable of.
Play it here: http://shards-game.net (best played with Google chrome)