If you don't have patience and quick reactions then don't even bother clicking the link, this is certainly challenging!
I have had a few go's now and the best i've managed is level 28/30 with 202 deaths and that level is literally beyond my limits. Aim is to complete all 30 levels with the least deaths.
Also, screenshots to save the bullshit if you have a decent score
Good luck
http://www.addictinggames.com/theworldshardestgame.html