I was planning on eventually adding server list support.

There's so much to be done, though, it may not happen soon. For example, the following still have to be dealt with:
-Bosses
-Other broken events
-Physics bugs
-Bonus levels
-Animated portions of cutscenes
-Visual effects, e.g. greyscale screens in Letni, reflective pools in Technoir, water
-Sound effects' speed/pitch

And that's just off the top of my head!

There's a new version. There are a bunch of bug fixes, and it's now possible to use JJ2-style controls (up arrow for swimming upwards, enter to change weapons. At least, I think enter is JJ2's default. It's what I use). There's also a water level indicator, which is handy.