I don't know if any of you played the old deathball/notpr0n game, but if you did, you'll definitely like http://www.ouverture-facile.com/ - a bit easier so far, but it's in the same vein as notpr0n. Oh, and there're more levels too. Yay. ^^

stuck at lvl 6

Between windows and space is the alt key. It's also the key you use to do ASCII-to-text (alt+102 becomes "f", for example).

Also consider the page title, and what you already know.

I'm on level 27, and I won't slow down (it doesn't seem too hard, more tedious than anything).

Playing at work without a soundcard is a pain in the arse

well, yeah. So far I'ven't needed it for more than 2 levels though.