Ok, I take back what I've just said: I've tried the flash demo and the game is that kind of sadistic little bastard I enjoy killing my keyboard on from time to time. It seems even shorter than Valve's Portal (and this isn't necessarily a totally negative thing, imho), but could be worth the money the author claims.
Anyway I've got too much things to play on recently, waiting to have the time to install a new CPU (Intel dual-core X9100 "Extreme" @3,00 GHz, I'm looking forward to it), re-play Halo, Oni, Diablo, Resident Evil 1 & 2 and other things I don't recall at the moment so this "VVVVVV" madness has to wait for its time in my computing agenda :-D