As posted on http://zzt.org/fora/viewtopic.php?f=4&t=3393 :

The topic in #club said it was a 24hozzt but only I submitted anything?!

I ended up using only 3 of those hours. The result should take you about 5-10 minutes to beat.

Wonder if anyone made a ZZT game after this, at all. God I can't believe this was a year ago