I found this post from last year Marty Goldberg made on a classic gaming Facebook group about Joyce Weisbecker:
"She's the daughter of the inventor of FRED and the RCA COSMAC microprocessor, Joseph Weisbecker. The FRED was the full fledged microcomputer that hooked up to a standard television set, which Joseph first laid out in '70 and had the TTL based proto done by '71. It evolved through several revisions and made it out as several products, including the Microtutor. Most of the software (including games) was written in the '73-'74 period. In '74-'75 the FRED was also done in a coin format for testing (which RCA did at several New Jersey malls). Then later in '75 it was decided to try a home console format for FRED, which became the RCA Studio II (released in January '77). Per Joyce, the games she coded were Slot Machine, Snake Race, Speedway/Tag, TV Schoolhouse, Slide, Sum-Fun, and Sequence Shoot. Speedway and TV Schoolhouse of course wound up as Studio II cartridges as well, and the latter three wound up as games on the COSMAC VIP (a gaming computer released in '77)."
Could her Slot Machine game have ended up on the Gambler program? No idea what some of those other ones could have ended up as.