Changes
/* Masked Backgrounds */
*Head over Heels : probably... yet the colours are betterly used than in Heroquest. If you look carefully, there are 2 kind of "background" elements...
**Real non-masked Background (floor, walls) which use the full 4 colours,
**and masked elements such as... Sprites, Doors, platformsPlatforms... which are 3 colours only.
===Unmasked games and CPC colour clashes===
