Question: When Josh accuses John Heard of cheating at racquetball, was Heard in fact cheating, or did Josh just not understand the rules of the game?
Answer: Paul (John Heard) tells Josh that the serve has to cross the yellow line. When Josh calls the ball short, Paul is basically trying to cheat and claims he never said the ball has to cross the line. Although I'm trying to figure out what racquet sport their playing. It looks like they're playing on a handball court, but the racquet sports I know, the ball has to cross the short line (the yellow line in "Big") on the serve but you also serve from a service area where you have to stand in front of the short line, which they don't do.
Answer: According to imdb: Though some believe it to be Colossal (Cave) Adventure or an early Sierra Game, no known game up to 1988 accepts the commands "melt ice wizard" or "throw thermal pod" (as used in the movie), therefore one can assume the game screen was simply created for the movie.
Carl Missouri