The best platformer usually has a wonderful art style, solid jumping mechanics, fun puzzles, and gives off a feeling of even nostalgia.

Sound Shapes

Sound Shapes is a really underrated game, but there were a lot of great platformers this year. Tales from Space and Fez came in a close second. Sound Shapes has some great modes and the soundtrack is superb as well as solid jumping mechanics. This is just one awesome platformer.

Runner-Ups

Tales from Space: Mutant Blobs Attack

New Super Mario Bros. U

Fez

LittleBigPlanet PS Vita