I saw Mario (the author) at Zigtoberfest in Munich last Saturday where he gave a presentation on a whole stack of related projects implemented in Zig: A graphics library for the terminal (movy), movycat (video playback in the terminal), zig64 & zigreSID (emulators for Commodore 64's CPU and sound chip), and a reimplementation of a C64 video game (which I don't think he has published on GitHub yet). Anyway, I found his work incredible and thought he deserved some attention.

Update: Since writing this, Mario has uploaded the game, too: https://github.com/M64GitHub/1st-shot . I misunderstood, though: It doesn't seem to be a port of an actual C64 game.