Fourspriter: Alternate Version

[LCD]

However, it's possible to cut down the amount of memory used for buffers and back-screens by reducing effective screen area. I'm not quite sure how all that could work in ZX BASIC as it stands, which doesn't really have the interface at the moment.

Interface is not the question. If you tell the compiler to use a screen area using command line,you won't be able to draw anything outside, not even the score an a panel. I think about defining Backbuffer area with a own BASIC Command: BACKBUFFERr xpos, ypos, width, height [,adress]
A variable adress of screen for all drawing routines (PLOT, PRINT, etc.) would allow to use a own screen buffer or second screen on Spectrum 128:
DRAW AT 49152; x, y (AT as optional modifier to define adress of screen)
:wink: