About Graphics:
CliffyB says that they have improved graphics: shadows, wind, animations and stuff. But it is difficult to improve it a lot because of engine and hardware limitations.
Also there are stuff about Casual difficulty and how a lot of people never finish the game, so they made it even more easier (on Casual difficulty).
There is a lot of stuff about gameplay - I have never played GeoW, so it is difficult for me to translate it properly.
Play my LittleBigLove level: search keywords "LittleBigLove realil"
LJ (Russian): http://realill.livejournal.com