Developer wojciech-graj created a port of Doom called cyDoomGeneric to run the game within Microsoft Paint on Windows XP. Each frame of the game is drawn in real-time using a special algorithm, taking between one to two and a half minutes depending on the scene complexity. Players must color in keys that appear at the end of each generation to control the game, requiring a slow-paced gameplay style.
Source: https://t.me/allhypes