Finally got round to testing it on the Next, couldnt get into the code though, BREAK just resets.
Struggling to get to grips with the Next if I'm honest.
Anyhow in the meantime I have a new Speccy game for you to have a look at called Mutant Mushrooms.
https://death-squad.itch.io/mutant-mushrooms
A Robotron type affair inspired by your Cloud People release.