Even if extracting NES game data is not your thing, the emulator concept [Matthew] uses might be still worth a read.

Learn how to make a game in Python using the popular Pygame. You'll learn how to handle player inputs, draw graphics, and more.

Coding without a keystroke: The hands-free creation of a full video game From the archives: Now on the Switch, Dig Dog is an awesome bit of speech-to-text coding.