Recently, I've found out there has been plenty of hacks/mods for Chuckie Egg (http://www.bagshot-row.org/chuckie-egg/hacksandupgrades.html) on the BBC micro.
I've managed to port Chukee (https://www.bbcmicro.co.uk/game.php?id=509), a 1984 hack from S.D. Ellington coming along with a thorough description of the level-design of the game. It offers a new set of 8 original levels.
Credits go to S.D. Ellington for his upgrade & tutorial, and the A&F team.
Run"chuck3.bas" & enjoy.
Run"chuckie.bak" to play the regular first version.
PS: Behold my death dive !
Can't have enough Chuckie Egg.
https://youtu.be/4aMbQCgiwHM
This is really cool! It was my game back then on the BBC!