Pixel Factory is the first level of World -1: the Minus World. It is based on the game roster for the classic Atari 2600 console, and contains enemies, hazards, and references from a number of Atari 2600 games, such as Adventure, Berzerk, Pitfall, Frogs 'n Flies, H.E.R.O., Jungle Hunt, Space Invaders, Reactor, Kaboom!, etc. It also contains a large number of custom hazards and environments made in a similar style to the games of that era, and even a few elements from Pong, possibly the most recognized game in classic video game history.