A Mighty Shove

My toes twitch. Heavy. Grounded. I roar silently, jaws unfreezing! Directly ahead lies a glossy black border guarding a flat white plain covered in scrawls. An obstacle? Unacceptable! I plant my stout legs and throw my entire chest against the frame. *Clack!* It nudges outward. Victory is mine! I reign supreme over this black surface.