Where does it say that you should enter your kong password?
The current text is:
To improve the safety of your game profile, please enter a password below. \nDont use the same password as one that you use for a sensitive account! \nOnly the characters: a-z, A-Z and 0-9 are valid, password must be 3 or more characters
if youre getting the "You have a old client version! " error, clear your browser cache and reload, should work then.
The stats/leaderboards have move to the server now, before they was stored in flash cookies, which is very unreliable.
Notice that the game is work in progress :)
more detailed stats are avail. at
(this will be integrated in the game later)
however it's only been collecting wins and deaths for a few days.