Those who keep a close eye on only_69's maps will notice that he favors Spectrum conversions. Some of these conversions are colorful, others are monochrome but with excellent artwork nonetheless. That's the beauty of these maps, to see how game maps are built, which is excellent study material for game developers. The latest map is about the 1989 game Commando Quatro, made by the Spanish Zigurat. This game features very decent and colorful graphics, making this map a well-worth inspection!
Relevant link: MSX Solutions