At the time, the company was in the process of moving from the strategy game market to action titles, which they released under their Epyx brand. "Jumpman" was the perfect title for the brand, and the company hired him. Aiming the game at the newly enlarged RAM available on the Atari 800 led to the 32 levels of the final design. The Atari release was a huge hit, and the company soon abandoned their strategic games and renamed as Epyx. Glover then moved on to a C64 port, which was not trivial due to a particular feature of the Atari hardware Glover used to ease development.