Well, it took me less than 40 minutes to get through to level 12 [including looking up the syntax of SSI as I had more or less forgotten all of it], though level 12 is actually the same as level 11 because it hasn't been completed yet, and one of the earlier levels has been disabled.
Interesting site.
In other news, the BB housemates are having a flaming row with Lisa on the live feed.
