It's not full-screen.
Yeah but it looks like it is in almost "normal 320x200" which is far better than so many speccy ports or even spanish games in "256x192"... or even less...
and the playing area seems to be 156 mode 0 pixels wide, instead of 160. Interesting...
One character to get the scrolling erased properly ?
Anyway, I have too few pictures to compair but it clearly looks more coloured on CPC as usual.
C64 :

CPC (yet not the same part)

Sadly the few visual are clearly ported from the C64...
I mean, to get a gradiant going from Dark Red (=brown) to Cyan or Green is clearly C64ish ports.
But I'm OK with this, still look saucy and juicy good.
While some tiles (= most) on C64 has only 3 colours+black, the CPC looks like being in 4 colours + black.
Every thing is +1 colour thx to the No Attribute limitation stuff... sadly the Palette on CPC can't always handle this so well, but hey, the 16 colours max limitation per rasterzone is also a brake.
And to redo graphics while respecting original design is such a paiu in the A$$ wen you port from C64 to CPC...
Still certainly a lot of job to add the Extra ink on every graphics... well done.
And I haven't found the Sprites and Tiles sheet on CPC version... which would be quite interesting.
Just a question : is there any Raster for the HUD ?
Probably as I can count 13 colours for ingame window and 13 colours for the HUD only but total 17 colour on the full screenshot (the CPC screenshot already posted here)...