it depends on if it uses the same format as CPC version.

Nebulus hard harder levels I was sure game basic levels were hard as rock.

Not so hard. Only at one level (one of the last) you can go astray. But all other has only one way (with minimal branching).
In my childhood I have only version with endless timer so I can freely explore all levels.
And at year 2005 I've beat DOS version without any cheating (at the 35 try in several days, or something). Later I've find out about another DOS version which contain additional harder levels.

https://www.youtube.com/watch?v=rc2MigzEYAU&ab_channel=AmstradiensChannel this looks impressive on CPC  even the screen size is really small