I held a seminar at ElectroFringe 2016 on how to program the Atari 2600 and gave a demo of Barky Pup, the barking dog simulator for the Atari 2600 written in assembly.
While I update this post with content from my talk, feel free to download the game and play it in the Stella emulator.
The goal of Barky Pup is simple: you bark! But how often can you keep up the noise before your owner gets fed up and has you put to sleep??