Jubilee Joy Megademo
From CPCWiki - THE Amstrad CPC encyclopedia!
The Jubilee Joy Megademo was initiated by Dreamer as a "birthday gift" for the tenth anniversary of the Amstrad CPC.
Contributions came from: Dreamer, Collapse, Purple and Odiesoft (the last one contributing the technically most interesting part of the demo).
It contained a secret part that could be started by running the file "T-PART.JUB".