Tonight, I finished the fifth and final example game from Oscar's book "Programming Games for Atari 2600", called "Diamond Craze". Additions to this last game are difficulty selection, game reset, lives, and multiple enemies chasing your player on screen. Like previous games I coded, I finished earlier, but spent a couple days working out bugs due to my typos. I really can't recommend this book enough. I went from knowing absolutely nothing about assembly language and only minimal experience