3D world is available to pre-download on the eShop. So the icon should be available as well. 
The japanese one (if you set the system to japanese) is 100times better. The US/EU one is meh 
2
Oh ...
Booh
What a weird decision on the logo
Hip
White on white with a shadow will never sit well with me
Title says it
Oh my
Wait. So there is a collection icon and a single icon for each game?
They wanna make sure you never forget that it's a mobile game