I only joined the project just this week, but I can tell you that the game isn't playable yet. It launches and runs, allowing you to create a character and walk around in town. Most functionality isn't wired up yet. There are a lot of opportunities to contribute.
There are no plans to support any other games, but it sounds like they expect to be able to use it to create new games.
There are no plans to support any other games, but it sounds like they expect to be able to use it to create new games.