An insecticidal composition having as an adjuvant a phosphonate or an alkoxylated derivative or dimer thereof. A virtual view position movement module moves a first virtual view position for a first player and a second virtual view position for a second player at the predetermined speed, but stops the movement of the first virtual view position upon detecting first stop information and stops the movement of the second virtual view position upon detecting second stop information. The rolling ball is made of transparent material and the distance thereof with the light receiver is adjustable to vary image resolution.