The 10th level of Geometry Dash that introduces gravity pads and rings/orbs. The song is fine on its own, but yStep is one step further.
Also, searching X-Step or Xtep on le Goog may lead to xStep, so be careful.
Jerry: "This level is quite fun, honestly."
Jacks: "What level?"
Jerry: "xStep."
Jacks: "Oh, that level is meh. Hexagon Force is better though."