There is no icon to click on on my PC. Nor is there one on my android phone.
The top line of the page has menu selections. From left to right they are: my games, new game, open invites, players, view games, etc. etc. The last one on the right is "Blitz". None of these are icons, just text links. Going further to the right there are icons for notifications, messages, games waiting, and finally the last thing there is your log-on avatar/icon.
This is on my laptop (hp) running windows 7. With the page on 'full screen'. If you make it into a partial window the 'blitz' link may go away from view until you go back to full screen.
But if you do not have that on your pc at all I don't know what the problem might be.