Thanks Dan – wanted to let you know that I used some of your code as inspiration for the LunarLanderBadge my son and I made for DEF CON 27. I’ll be putting my code up on github after August 2019. I used C++ with the Arduino IDE, running on a ESP32 — considerably more powerful than anything back when the original Lunar Lander game was created, You can see from the video on Kickstarter that my implementation is closer to the Atari game, but I found your code helpful in the early stages.