This sounds nice, hopefully it may cause some sort of an influx of grayscale platformers and such.
aeTIos, I'm sure you supply your own tilemap, and it's a very easy routine to write - maybe not worth the space in the library it would take up?
(I assume this is an Axiom, or is it a Zedd-esque style of include program, written in Axe?)
Also, does it automatically do dispgraph by itself, or do you need to include that yourself? Because if it doesn't do it by itself (or I guess even if it does) if you want to shift more than one pixel per frame, you can just call the Shift-Screen or whatever similar function multiple times.