I remember the game!
It was amazing such 3D with light/shadow on the ZX Spectrum!
I was too young a the time to really know what I was doing though. I vaguely recall going to the reactors and you had various filled shapes that you had to match congruently into a circle oor something...
Puzzles with large rewards can become repeatable, exploitable cash-cows once a solution is 'known'. I'd personally like any individual player mini-puzzles to be entirely unique so that players cannot just look up solutions. I'm also leery of 'big rewards'.
What's wrong with small rewards? Good gameplay doesn't need to wave a golden carrot.
But yeah.. nice idea. repped for being constructive.
Yeah unique puzzle each time, or at least a large enough variety it would be difficult to know which one it was.
Was the original unsolvable? That would explain why I never finished it lol. I used to just fly across the planet for hours trying to see how far I could get.