 The graphics of the game were designed by Bob Thomas , whereas the code was written by Dave Thomas . The Thomas brothers decided to show their progress of the game to Tim and Chris Stamper for evaluation , despite feeling embarrassed due to their <unk> being inside their parents ' attic . Impressed by the game , the Stamper brothers commissioned an entire series to be released for the Commodore 64 . Dave Thomas recalled that every game they produced was met with little interference from Ultimate ; once a game was complete , it would be sent to quality assessment and subsequently published for release . 
