New Game link does not seem to work

[ghost]

I am on firefox (latest, version 43.0.04) and linux (slackware 64 bit).

The URL I use is:

http://executive-man.com/?soundoff=true

A text appears. "New Game" and some other links.

If I click on "New Game" no new game appears but instead the intro slides in from the left.

This seems to be a bug?

Could there be some more hints added to the game itself in how to start the game?
Perhaps a mouse onhover event or perhaps some other way to get it started,
some notification over the intro text "New Game" when a user clicks on it.

Right now I am absolutely clueless as to why it does not work.

When I click on "New Game" once, the whole intro screen scrolls in again
from the left; if I then click on "New Game" again, nothing happens,
strangely enough, so I assume that the code registers that a mouse click
event has happened, but it responds in a strange way.