Bloxorz
Quick to load (requires Flash)- has a save - surprisingly addictive
I have fell off the edge three times and given up.
Well so did I at first, but eventually I got to level 10. I had to stop to do some things so I will play again later. it's quite fun when you get the knack of it
I wasted too much time on it. It is quite addictive.
I am just hopeless at it 
no spatial awareness, that's me. Doesn't stop me trying though
Thoroughly time wasting and all the more reason why I will try to get beyond level 5 which is my meagre performance thus far!! Just let me know it's further than you got, Merry!! 
I have wasted loads more time and am currently puzzled by level 31...
/me I'll get me coat - no wait that means I will have to stop playing it
p.s. I have the pass codes for levels 11 to 31
I see I never replied to Chrissie - maybe I just didn't want to admit I never got further than level 3 
Very impressed, Ron 
- might go back to it sometime - and will keep your passcodes in mind for times of need
Well I finally got past level 31 and am now struggling with 32....
There are only 33 levels 
Ron