What's the single best game Nintendo has ever created?

[PAOerfulone]

Super Mario Galaxy.

Out of all the video games I have played, if there was one that I can actually, legitimately call "perfect", a game that I can actually give a 100%, 10/10, perfect score, it's that one.
Everything about that game just clicks. The controls, the level design, the graphics, the music, the setting, the gameplay mechanics, etc. It also helps that the best character in the entire Mario franchise makes her debut in that game. Every single time I go back to play that game I fall in love with it all over again.