This was neat, well done!

The only alternative version of Go I’ve played before was magnetic Go, where all the rules are the same except that, along the axis lines where you place a piece, like colours attract and opposite colours repel.

On Voronoi, I did feel like the continuous space made it really hard to judge whether there was enough room, whether the opponent could get in, etc. Maybe it would work better if it were discretized a bit? Or maybe I just need to play it more.