Imagine Super Mario Galaxy on a mobile device and you'll understand why Soosiz made it on here. The point of the game is to run and jump across a level—as per the, uh, very definition of a platformer—but the fun begins when you have to use gravity to figure out a way around obstacles. And, no, we don't know what the hell "Soosiz" means—just go with it.
FUN FACT: Soosiz uses a version of the "Up on the Housetop" Christmas carol during the level win screen. For OBVIOUS reasons.