This game has, I feel, pushed the limit on what I thought was possible to do with ZZT. It was an extremely difficult game, but I was able to manage to get to the final boss (I still have not figured out how to beat him).
I saw things that I had never seen before! In a ZZT game, no less! It was wonderful.
Probably the closest resemblance to this game to this would be Sixteen Easy Pieces by the departed Jack Masters, but it is somewhat paradoxical to compare the two because in that game virtually no objects are used until the very end; it was constructed almost entirely with the preset elements that come with ZZT. I don't think that the game even used STK, to be honest.
In any case, I recommend this game to anyone. And I certainly look forward to more from you guys.