I'm still working on it pretty regularly. I have maybe 95% of a very simple single bot simulator done, but my progress recently has been slow because I moved to London in November. I have some infrastructure stuff I'm working on right now but once that's finished I have another maybe week or two of some UI work/polish and I can release it. Fingers crossed I don't see why I couldn't release it sometime in the next few months, but I don't like making promises like that, as I'm usually pretty bad at estimating coding time.
Don't expect too much; it's the first executable that ties in a lot of the systems together at once. It's mostly a way for me to experiment with the glue that holds the different parts of the program together (DNA, rendering, UI thread management, etc.)