Last edited on 1 Jan 2019 by gasman.
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The first ZX Spectrum game to use the 'Multicolour' software-enhanced graphics technique in-game, instead of just on a demo or title screen. This allows high-resolution coloured sprites with pixel-precise (vertical) scrolling with no 'attribute' clash.
'Attribute clash' is a flaw often found in Spectrum games where two graphics of different colours overlap in the same character cell, but that character cell can only support one colour definition, therefore one of those graphics objects is forced to adopt the colour of the other. It comes about because the Spectrum has a high-resolution bit-mapped pixel screen, but colour is controlled by an overlay of 8x8 pixel character-cell 'attributes'.