worked with him at Ampex. Prior to working at Atari, Alcorn had no experience with video games. Bushnell had originally planned to develop a driving video game, influenced by Chicago Coin's Speedway (1969) which at the time was the biggest-selling electro-mechanical game at his amusement arcade. However, Bushnell had concerns that it might be too complicated for Alcorn's first game. To acclimate Alcorn to creating games, Bushnell gave him a project secretly meant to be a warm-up exercise. Bushnell told Alcorn that he had a contract with General Electric for a product, and asked Alcorn to create a simple game with one moving spot, two paddles, and digits for score keeping. In 2011, Bushnell stated that the game was inspired by previous versions of electronic tennis he had played before; Bushnell played a version on a PDP-1 computer in 1964 while attending college. However, Alcorn has claimed it was in direct response to Bushnell's viewing of the Magnavox Odyssey's Tennis game. In May 1972, Bushnell had visited the Magnavox Profit Caravan in Burlingame, California where he played the Magnavox Odyssey demonstration, specifically the table tennis game. Though he thought the game lacked quality, seeing it prompted Bushnell to assign the project to Alcorn. Alcorn first examined Bushnell's schematics for Computer Space, but found them to be illegible. He went on to create his own designs based on his knowledge of transistor–transistor logic (TTL) and Bushnell's game. Feeling the basic game was too boring, Alcorn added features to give the game more appeal. He divided the paddle into eight segments to change the ball's angle of return. For example, the center segments return the ball at a 90° angle in relation to the paddle, while the outer segments return the ball at smaller angles. He also made the ball accelerate the longer it remained in play; missing the ball reset the speed. Another feature was that the in-game paddles were unable to reach the top of the screen. This was caused by a simple circuit that had an inherent defect. Instead of dedicating time to fixing the defect, Alcorn decided it gave the game more difficulty and helped limit the time the game could be played; he imagined two skilled players being able to play forever otherwise. Three months into development, Bushnell told Alcorn he wanted the game to feature realistic sound effects and a roaring crowd. Dabney wanted the game