GO Game is a GO game by harraps. The game is playable and implement a counting system to display the score at the end of the game. You can comment/uncomment one line of code to display the territories instead.

Release notes:

I’ve updated the game now it’s called pico-go. I’ve implemented your suggestion except for the smaller cursor if the cursor was 5*5 then the goishis should be 5*5 too and there would be a gap between each goishis and it wouldn’t look good. But yeah at first I was frustrated that I couldn’t align precisely the goishis on the board. But now I think it’s fine as it is.