So, the Game Boy has this very interesting layer that the NES lacks. A lot of games use it for boring stuff like status bars and the like, but some of them were more creative about how to use the window. A while ago someone (forgot who) mentioned a Castlevania game which used the window to draw big spiked walls and other large moving objects. Do you guys know of other good examples of creative uses of the window layer, for effects that wouldn't ordinarily be possible in 8-bit consoles with a single background layer?