Teeny Quests is more than a browser-based game. It's a full-fledged web application with an emphasis on the quest editor, so basically anyone with a bit of curiosity and some time to burn and create something uniquely theirs from a fairly simple set of tools.
Explore dungeons and outdoor settings surrounded by adorable isometric SVG graphics. Be careful, though, don't wander too far without scrounging up a better weapon. The "pointy stick" won't do any good when you run across the Skello King.
Check out the source code or a teaser video.
