I found some old thread regarding this online "game", but it's long forgotten.
So, you puzzle lovers, have you tried this one?
Complex, weird, frustrating, but logical "game". I'm using qoutes because this isn't just normal game with plot, characters, points etc.
Your only goal is to pass to next level...
http://deathball.net/notpron/
(I'm on level 72, but haven't played in a long time. And, yes, I admit it, I cheated few times)