Upon completing the crossword the page auto-submits the solution and gets "403 Forbidden" in response. Something got broken somewhere or someone has pulled the plug.
<< POST / HTTP/1.1 Host: ig-game.appspot.com ... >> HTTP/1.1 403 Forbidden Alternate-Protocol: 443:quic,p=0.02 Cache-Control: no-cache Content-Length: 0 Content-Type: text/html; charset=utf-8 Date: Tue, 25 Nov 2014 21:32:12 GMT Server: Google Frontend Set-Cookie: session=(snip); Path=/; HttpOnly X-Firefox-Spdy: 3.1
Content-Length: 0