One version is common, at least one other version is rare
 Game development by Novotrade; development supported by Software and Video Arts. Coding by István Cseri, József Szentesi and Zoltán Kanizsai. Graphics by Zoltán Tóth (Sultan). Original music composition & arrangements by Chris Grigg; music arrangements & coding by TamásRévbíró and Gábor Pongyor.