Got a nice background effect going in Petit Switch, last night.
A parallax side-scrolling sky/ground thing, with trees and clouds swooshing by at high speed.

Today I need to decide on what sort of game should go on top of that.
I'm currently thinking some sort of fast paced shooter, a bit like Space Harrier, but only as a side-scroller, because I'm rubbish at pseudo-3d!
Not sure.

Find out tomorrow, I guess!