And now that you mention rivalry, or competition, it might be fun to have a competition to see how close to something like Second Reality one could get on an MSX (or MSX2), using, say, just a 128kb MegaROM 
(and bonus points for a basic 32kb cartridge)
exactly, and notice that background objects only have black and one other color in each horizontal line, and that objects that have different colors are spaced more than 8 pixels apart, to prevent color clash when things scroll across tile borders, which is a common constraint of this technique when used for horizontal scroll. Very nice demo btw!
Yes indeed, this is very well done.
There is also clever use made of 'shadows' in order to get objects closer together without color clash: notice the black parts of the brown ladders right next to the green patches of grass.
