Tic Tac Toe Version 0 in APL

I've spliced together some screenshots from VIM.

APL Tic Tac Toe Version 0 Page 0

APL Tic Tac Toe Version 0 Page 1

APL Tic Tac Toe Version 0 Page 2

APL Tic Tac Toe Version 0 Page 3

APL Tic Tac Toe Version 0 Page 4