You can read the rules of Go on wikipedia. Simply click on a position of the Goban to place a stone. The banner at the bottom show which player can play.
There is no end game yet.
You can grab a precompiled version of the game here. Execute
gogo.exe
for windows 64bitsgogo
for Linux 64bits
You'll need the library Ebiten by hajimehoshi to compile it. to build, execute:
go build board.go liberty.go main.go vector.go window.go -o gogo
to run, execute:
go run board.go liberty.go main.go vector.go window.go