Nothing wrong with it, I spent endless hours playing it. But I saw the arcade version only afterwards, and I went "oooooh, colours!"

The "native" Spectrum games were better IMO. Sir Fred comes to mind. Pentagram, Gunfright, Knight's Lore, Abu Simbel Profanation. These worked with the limitations of the hardware (most notably the colour clash), not against it.

I mean, there even was a Spectrum version of Operation Wolf, and it was kind of atrocious (but still unbelievable that they made it work on such modest hardware!)