I dunno, I'd call Sunshine bad even if it weren't a Mario game! I have numerous issues with that game.
WAY too much emphasis on stupid Blue Coins
Kinda weak final boss fight
Beyond those two things I don't see that much wrong with it.
The FLUDD-less platforming sections in particular are an incredible precursor to Galaxy's awesomeness.
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Thank you, Eddie Guerrero.
http://tinyurl.com/73jgc2r