Under Linux Mint 64 bit, using both Firefox and Chrome browsers, I can make a move in my 13x13 Hex games using any other color scheme. But when I choose the Go style display with the stones on the intersections, the mouse icon remains an arrow shape instead of a hand shape when I move over the board, and clicking on an intersection point has no effect. I have the same problem on my Android phone using Chrome. I have posted the bug on bitbucket.