every sonic game of wii u is not perfect, Sonic Boom is bad and buggy and Sonic Lost World is a great game but is a Super Mario Galaxy inspiration.
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Sonic x treme: xD
Not every single thing in Lost World is Mario Galaxy inspired. The only thing I see it's kinda Galaxy inspired, is the way you jump from a place to another. Everything else is like based on a classic Sonic game, and Colors. BTW, Lost World still haves it's own unique stuff.
By the way, when I was a kid, I didn't even notice that inspiration from Super Mario Galaxy when traveling through worlds. But I did notice from the beginning that Zavok is basically a Bowser inspiration.