Kastle Kumquat too. I had to pester Edgar a while before he relented and remade it with me. I am proud of that one too, Edgar made that game so smooth. A colleague of mine is playing it now and planning to put a speedrun video up when he has mastered it. I have to keep telling him about secret areas and how to retain keys for getting to extra rooms
Kastle Kumquat is free and still can be found online.
http://www.warblade.as/kk/kk.html