GEOMETRY DASH; GEOMETRICAL SHAPES RUNNING; SHAPES WHICH CAN BE DESCRIBED USING MATHEMATICAL FORMULAS MOVING AT A CERTAIN SPEED; GEOMETRICAL SHAPES, SUCH AS SQUARES, TRIANGLES AND CIRCLES, WHICH CAN BE CALCULATED IN MATHEMATICS USING VARIOUS DIFFERENT FORMULAS WITH CERTAIN VARIABLES AND OPERATIONS, MOVING FORWARD OR BACKWARD, DEPENDING ON WHAT MIRROR PORTAL THE PLAYER HAS PASSED THROUGH, AT VARIOUS DIFFERENT SPEEDS, AGAIN, DEPENDING ON WHAT SPEED PORTAL THE PLAYER HAS PASSED THROUGH