+ Insert floppy #100 joke?
+ double link noise (once when leave, once when get there?)

Make game winnable:
+ Allow access to all marker switches
+ Track state of marker switches (draw them properly?)
+ Allow looking at green book on shelf
+ allow getting in the fireplace
+ allow entering code

Add one of the other ages/puzzles:
+ ??

Make graphics use lzsa compression

Move sound to language card (meaning no sound on II+ w/o language card)