The screen 3 parts where the pixels are alternating between coloured and black, did you do that by design (to make the colours less heavy and solid) or is it also a trick for less calculating and updating?
To be honest, the main motive was to have to do less calculating. But lets say that the design-reason is the official one! 
nice pixeldump 
btw. Is you nick "Shadow" ?
btw. Is you nick "Shadow" ?
Yes. I usually shorten it to 'Sdw' on messageboards and IRC etc. because most of the times 'Shadow' is already occupied. 
new Shadow, meet the old Shadow
active Shadow, meet the lazy Shadow
Well, then I can't claim seniority, because I think the oldest things I can dig up where I first used the handle 'Shadow' is some C64-demos from 1990 or 1991.
Don't bother, I was active as Shadow since 1987 already oh, you need proof? gheh, I'll have to snoop around in the attic to see where me disc are.. neh, not gonna.
Oh well, we just call you Shadow and I will change me name to "Wolf" okay?
...oh, wait.... damn