Back in 1987-1990, I wrote several demos for the Commodore 64 as a member of the groups 'Excess' and 'Thundertronix', using the handle 'Mantis'.
I've written up these pages as a form of archaeology of my early hacking career. Each page provides links and a full description of the demo. These are only a few of the demos I wrote, but the others are lost to posterity, unfortunately...
* Stercoraphasia - possibly my first released demo, a sinus-editor utility
* Mastocephaloid - "17 vertical scrolling messages"
* Rhaphanadosis - my best demo, no less than 8 parts