Well done TCD. That's it Dynamic Debugger. The name actually came to me that night - strange how your brain does that.
I just googled it and found this:
Richard Hewison used to work at Imageworks, and mentioned that John Knox was behind the game for around 2 years, but nothing much was ever completed. The demo shown in magazines for the Amiga was a very simple HAM mode demo with a few sprites flowing around. It was nowhere near finished at that time. Eventually it was pulled before Mirrorsoft went into administration at the end of 1991.
Thanks for the other HAM games. I partly wanted to count the number of actual onscreen colours in some Amiga games. So far if anyone is interested I have
Paradroid 90 = 28 colours
Xenon2 = 16 (makes very good use of those colours!)
Cadaver = 16
Lionheart - 176! (analysis shows most of those colours are in the background copper graduation, every few pixels is a new colour). It's not always that many, another screenshot was 52)
Shadow of The Beast 1 (first level with all the parallax) = 78