The first part of another game exposed by only_69: Mortadelo y Filemon II, known also as Clever & Smart II or Mort & Phil II. A Spectrum conversion by Animagic with the obvious Spectrum color limitations. Yet there is this cartoony quality about it, even with this epic clash of colors, the graphics certainly aren't bad. But, best is to judge it for yourself of course.
Relevant link: MSX Solutions