Compare this game to Peyper's 1985 'Odin'.
In the two backglass photographs shown here, the upper right corner of the backglass indicates, "THE CREATOR E. Pingarr�n". However, this credit is missing from the backglass in the manufacturer's flyer. However, the text on the back of the flyer, roughly translated, states, "SEGA, S.A., Sonic has had on this occasion with the collaboration of a professional with over twenty years in the design and manufacture of pinball machines, E. Pingarr�n". As far as we know, Eulogio Pingarr�n was not an employee of Sonic, and we do not know if Sonic employed one of their own designers as a participant.
