The BBC Micro conversion of Ultimate‘s classic Lunar Jetman is a very good one, using a high res display mode for the graphics, which are mostly monochrome (just like the Spectrum original).
Ultimate Play The Game‘s amazing Jet Pac is an early ZX Spectrum classic, first released onto an unsuspecting world in 1983.
The ZX Spectrum Loading Screens on all the early Ultimate Play The Games titles are so beautiful that I can’t resist running them again. Any excuse. They are wonderful pixel art from a bygone age of game-making.