I'm not sure how tough this one was in it's original state. majic1 cracked it pretty easily. LNS also.
All I did was change some invisible walls to floor tiles. Otherwise, it retains it's integrity.
Here's the text I wrote in February 04 for the "original".
I was a whiner back then, too

DiscGolfer wrote:I am amazed by the levels that y'all are coming up with.
I get some good ideas, but am usually too impatient, or don't make the time, to take them further. Instead of expanding upon the design, I just find a way to get it over with by either not making it playable, or just slapping a time limit on it.
Here's an example. Try this one in the timed mode. 30 Seconds is about right.